What Preachers Mean When They Use Them
Preachers have a habit of tossing around long, complicated words like they’re handing out candy. Most people in the pew smile and nod, quietly wondering what any of it means. This article is for those people.
Every word explained here is given in plain English — the kind anyone can follow. No seminary degree required. The goal is not to water down the ideas. The ideas are big and they deserve to be taken seriously. The goal is to remove the mystery so that the ideas can actually land.
These words are not arranged alphabetically. They are arranged in the order that makes the most sense — the order that tells the story. The first four words (Gospel, Sin, Faith, Salvation) are the whole Christian message in miniature. The words that follow build on that foundation, going deeper into who Jesus is, what he accomplished, and how Christians are meant to live in response. If you read from beginning to end, by the time you reach the last definition you will have a working understanding of the whole shape of Christian theology.
If you are looking up a specific word, use the table of contents below to jump directly to it.
Part 1 — The Core Story
These four words together carry the entire Christian message. You could summarize them in one sentence: we have a problem (sin), God provided a solution (salvation through Jesus), and there is one way to receive it (faith) — and the Gospel is the announcement of all three. Everything else in this article builds on these four. If you only read one section, read this one.
Gospel
Gospel is an old English word that simply means “good news.”
When preachers say “the Gospel,” they mean the most important piece of news in human history: that Jesus Christ, the Son of God, died on the cross to pay for every wrong thing we have ever done — and then came back to life three days later. That’s it. That’s the Gospel. The Good News. (1 Corinthians 15:3–4)
Because of that news, anyone who trusts in Jesus will be forgiven. Not because they earned it or deserved it, but because Jesus paid what they owed. (John 3:16)
The word also shows up two other ways you’ll hear in church. First, “the Gospels” — capital G, plural — refers to the first four books of the New Testament: Matthew, Mark, Luke, and John. Those four books tell the story of Jesus’s life, death, and resurrection. Second, when someone says “preaching the Gospel” or “sharing the Gospel,” they mean telling other people this same good news — that Jesus saves.
So whenever you hear the word Gospel, just replace it in your head with “the good news about Jesus.” That’s all it means.
Sin
Sin is any thought, word, or action that falls short of what God is and what he requires. (Romans 3:23)
The most common Greek word for sin in the New Testament is hamartia, which literally means “to miss the mark” — like an archer whose arrow doesn’t hit the target. The target is God’s standard of perfect goodness. Every human being misses it. Since we all miss the mark, that means we are all sinners. We can never live up to God’s standards on our own. However, there is Good News — as we learned in the last definition.
Sin is more than a list of bad things we’ve done. The Bible describes it two ways: as acts and as a condition. Acts of sin are the specific things — the lie we told, the person we hurt, the right thing we failed to do. The condition of sin is deeper: it is the broken nature every human being is born with, the built-in tendency to put ourselves first and push God out. You don’t just commit sins. Before you ever do anything, you are a person who sins by nature. Because of the original sin of Adam and Eve in the garden, we are born sinners. (Romans 5:12; Psalm 51:5)
This matters because it explains why simply trying harder doesn’t work. If sin were only a behavior problem, self-discipline might fix it. But if it’s a condition — something wrong at the root — then it requires a different kind of solution. That’s where the Gospel comes in. There is the Good News on which we can count.
Sin also has consequences. The Bible is plain about this: sin separates people from God. (Isaiah 59:2) Not because God is cruel or distant, but because a perfectly good God and an unaddressed wrong cannot simply coexist. Something has to be done about it. The entire story of the Bible is about what God decided to do about it.
Faith
Faith is trust. Not blind trust — trust based on what you know to be true.
People sometimes think faith means believing something without any evidence, or even believing something in spite of the evidence. That’s not how the Bible uses the word. Biblical faith is more like the trust you have when you sit down in a chair. You don’t see inside the chair. You can’t prove with absolute certainty it will hold you. But you’ve sat in chairs before. You can see this one is solid. So you sit. That act of sitting — committing your weight to what you believe will hold you — is faith.
Hebrews 11:1 says: “Faith is the assurance of things hoped for, the conviction of things not seen.” Assurance. Conviction. These are not words for wishful thinking. They are words for settled confidence.
Faith in the Bible has three parts that work together. First, you have to know something — you need real information about who Jesus is and what he did. Second, you have to believe it is true — not just possible, but actually true. Third, you have to act on it — to trust Jesus personally, not just agree with facts about him. The third part is where a lot of people stop short. You can know everything about a doctor and believe he is a good one, but faith is actually going to see him when you’re sick.
This is why the Bible says faith is how a person receives salvation — not as a work you do to earn it, but as the open hand that receives what God has already provided. (Ephesians 2:8–9)
Salvation
Salvation means being rescued — and the one who does the rescuing is Jesus Christ.
That name deserves a closer look. Jesus is his actual name, the name his mother Mary was told to give him before he was born. (Matthew 1:21) It comes from the Hebrew name Yeshua, which means “God saves.” His name is a description of what he came to do.
Christ is not his last name. Jesus didn’t have a last name the way we do. Christ is a title. It comes from the Greek word Christos, which is a translation of the Hebrew word Mashiach — Messiah. It means “the Anointed One,” the chosen king God promised to send. So when you say “Jesus Christ,” you are saying “Jesus, the promised Messiah.” It is a declaration of who he is, not just what to call him.
Now — what is salvation, and what exactly are we being saved from?
The Bible’s answer is that every human being is in a dangerous situation on their own. Sin has broken our relationship with God. We owe a debt we cannot pay. Left to ourselves, that separation from God is permanent. Salvation is God’s act of rescue — reaching in and pulling us out of that situation, not because we deserved it, but because he chose to.
The act of saving has several moving parts. Jesus lived the perfect life we couldn’t live. He died the death that our sin deserved, taking our punishment in our place. (Isaiah 53:5; 2 Corinthians 5:21) He rose from the dead, defeating death itself, so that death would not be the final word for those who trust him. (1 Corinthians 15:54–57) Because he did all of that, anyone who puts their faith in him is saved — forgiven, restored to a right relationship with God, and given the promise of eternal life. (Romans 10:9; John 3:16)
Salvation is not something you achieve. It is something you receive. A drowning person doesn’t contribute to their own rescue — they stop struggling and let the rescuer bring them to shore. That is the picture the Bible paints. Jesus is the rescuer. Faith is letting him.
Part 2 — Who Jesus Is
Before you can fully understand what Jesus did, you need to settle who he is. A good teacher dying on a cross is just a tragedy. God himself dying on a cross and rising from the dead is everything. These three words — Incarnation, Trinity, and Christology — all circle the same central question: who exactly is Jesus? The answers are not simple, but they matter enormously, because the entire weight of salvation rests on the identity of the one doing the saving.
Incarnation
Incarnation means God becoming a human being.
The word comes from Latin — in carne means “in flesh.” The incarnation is the staggering truth at the center of Christianity: that the God who created everything — stars, galaxies, oceans, every living creature — stepped down into his own creation and was born as a baby in a manger in Bethlehem. (Luke 2:6–7)
Jesus was not God pretending to be human. He was not a human being who later became divine. He was both at the same time — fully God and fully human — from the moment of his birth.
Why does that matter? Because it means God knows what it is like to be tired. To be hungry. To grieve. To be betrayed by a friend. To be in pain. He did not watch human suffering from a safe distance. He entered it. (Hebrews 4:15)
John 1:14 puts it plainly: “The Word became flesh and dwelt among us.” The Word — the eternal Son of God — became flesh. That is the incarnation. That is Christmas. What a gift! Merry Christmas.
Trinity
Trinity is the word Christians use to describe the nature of God: one God who exists as three persons — Father, Son, and Holy Spirit.
This is one of the most mysterious teachings in all of Christianity, and nobody fully understands it. That’s not a cop-out — it’s honest. You won’t find the word “Trinity” in the Bible. What you do find, running all through the Bible, is that there is only one God (Deuteronomy 6:4); that the Father is God; that Jesus the Son is God; and that the Holy Spirit is God — and that these three are not the same person as each other. The clearest single glimpse of all three together is at the baptism of Jesus, where the Son is in the water, the Spirit descends like a dove, and the Father’s voice speaks from heaven. (Matthew 3:16–17) Jesus himself named all three when he commissioned his followers: baptizing “in the name of the Father and of the Son and of the Holy Spirit.” (Matthew 28:19)
Think of it this way — and this is only an imperfect comparison, as every comparison is: water can exist as liquid, ice, and steam. Same substance, three different forms. The Trinity is more personal and more complex than that, but the basic point is that one thing can exist in ways that don’t fit neatly into our ordinary categories.
Theologians have argued about the precise language of the Trinity for nearly two thousand years, and there are plenty of ways to get it wrong. But the core of it is this: when you pray to the Father, speak to Jesus, or feel the presence of the Holy Spirit, you are not talking to three different gods. You are talking to the one God who is, by his very nature, relational — a community within himself.
Christology
Christology is the study of who Jesus is — his identity, his nature, and what he came to do.
You might think this is obvious — Jesus is Jesus. But from the very beginning of the church, people have argued about exactly who Jesus is. Is he God? Is he human? Is he somewhere in between? Is he a great teacher who was later declared divine? Is he God merely pretending to be human? Christology is the careful, Bible-based answer to those questions.
The answer the church has affirmed for nearly two thousand years is this: Jesus is fully God and fully human at the same time. Not fifty percent of each. Not God dressed up in a human costume. Not a human being who earned divine status. Both — completely — at once. (Colossians 2:9; Hebrews 2:14)
Why does it matter that Jesus is fully human? Because if he is not, his suffering doesn’t mean what Christians say it means. He has to be genuinely human to genuinely die in the place of human beings.
Why does it matter that Jesus is fully God? Because if he is not, his death is just the death of one more person. It cannot pay for anyone else’s sin. Only a sinless God can carry an infinite debt.
Christology also covers everything Jesus did: his teachings, his miracles, his death, his resurrection, his ascension into heaven (Acts 1:9), and his promised return (Acts 1:11). All of that flows from who he is. Get the identity wrong and everything else in the Christian faith unravels. Get it right — fully God, fully human, risen from the dead — and the whole story holds together.
Part 3 — What Jesus Did and What It Means for Us
Now that we know who Jesus is, we can understand what he did and what it accomplishes for us. Atonement is the act itself — what happened on the cross and why it repaired the broken relationship between people and God. Justification is the verdict that results — God declaring a person not guilty. Sanctification is the life that follows the verdict — the slow process of actually becoming more like Jesus. Soteriology is the big-picture word that covers all of it, the formal study of how people are saved.
Atonement
Atonement is the word for what Jesus accomplished on the cross — and why it fixed the broken relationship between people and God.
The word itself is almost self-explanatory if you say it slowly: at-one-ment. It’s about becoming at one — brought back together — with God.
Here’s the problem the atonement solves: sin separates people from God. Not because God is cold or distant, but because God is perfectly good and just, and sin is the opposite of that. A perfectly just judge cannot simply ignore wrongdoing. There is a debt, and it has to be paid. (Romans 6:23)
The atonement is the truth that Jesus paid it. He didn’t deserve to die — he had done nothing wrong. (1 Peter 2:22; 2 Corinthians 5:21) But he took the punishment that sin deserved anyway, voluntarily, out of love, so that the debt could be cleared for anyone who trusts in him. (John 10:18; John 15:13)
Theologians (people who study theology — the study of God) have developed several ways to describe how this works, different pictures that each capture part of the truth. One picture is a courtroom: Jesus takes your punishment. Another is a battle: Jesus wins a victory over sin and death that you could never win on your own. Another is a broken relationship: Jesus, as the perfect human, does what Adam failed to do and restores what was lost. All of these pictures are true. No single one of them captures everything.
But the bottom line is simple: because of what Jesus did on the cross, the broken relationship between a sinful person and a holy God can be restored. That restoration is the atonement. (2 Corinthians 5:18–19)
Justification
Justification is a courtroom word.
Picture a judge sitting at the bench. You’re standing in front of him, and the charges against you are real. You did what you’re accused of. You’re guilty. Everyone in the room knows it.
Then something extraordinary happens. Someone else — someone who has done nothing wrong — steps forward and says, “I’ll take his punishment. Let him go.” The judge accepts it. He looks at you and says, “Not guilty.” You walk out of that courtroom free.
That’s justification.
When the Bible says God justifies a person, it means God declares that person “not guilty.” Not because they didn’t sin — they did. But because Jesus took the punishment in their place. The moment someone puts their trust in Jesus, God looks at them and says: forgiven, clean, not guilty. (Romans 8:1; Romans 5:1)
Justification is not something you earn. You cannot be good enough to justify yourself. It is a gift, accepted by faith. (Romans 3:24)
One more thing worth knowing: justification happens in an instant. The moment you trust Jesus, you are justified. That’s different from sanctification — the slow, lifelong process of actually becoming a better person. Justification is the legal verdict. Sanctification is the life that follows.
Sanctification
Justification happens in a moment. Sanctification takes a lifetime.
After a person trusts Jesus and is forgiven, they don’t suddenly become perfect. They still struggle. They still make mistakes. They still have old habits and bad days. Sanctification is the word for the slow, ongoing process of becoming more like Jesus over time.
Think of it like learning to play an instrument. The day you decide to learn the guitar, you’re not a guitarist yet. But if you practice — if you stick with it, get a teacher, learn the chords, make mistakes, and keep going — you grow. A year later you’re better than you were. Five years later, better still. That gradual growth is what sanctification looks like in the Christian life.
The Bible says the Holy Spirit is the one doing the real changing. (Philippians 1:6; 2 Corinthians 3:18) A Christian’s job is to cooperate: read the Bible, pray, stay in a church community, and keep choosing to follow Jesus day after day. As they do, the Holy Spirit works from the inside, slowly shaping their character to look more like Jesus.
Sanctification isn’t about being perfect. It’s about being in process.
Soteriology
Soteriology (soh-teer-ee-OL-oh-jee) is the study of salvation — specifically, how people get saved.
The word comes from the Greek word soter, which means “savior.” So soteriology is literally the study of how the Savior saves.
Questions soteriology tries to answer include: What exactly are people saved from? How does it happen? Does a person have to do anything, or does God do it all? Can someone lose their salvation once they have it?
The short answers: people are saved from the consequences of sin — separation from God, both in this life and beyond death. It happens through trusting Jesus. God does the work of saving; people receive it by faith, not by earning it. (Ephesians 2:8–9) The deeper questions — about whether salvation can be lost, and exactly how God’s will and human choice work together — are ones Christians have debated for centuries, and good, faithful people land in different places.
Soteriology is a long word for a simple truth: people are broken and cannot fix themselves (Romans 3:10–12), but God sent Jesus to fix what we couldn’t, and anyone who trusts him receives that rescue as a free gift. (Romans 6:23)
Part 4 — The End of the Story
The Bible is not just a collection of teachings for today. It tells a story with a beginning, a middle, and an end — and it is specific about how the end goes. These two words deal with what that end looks like and how to read the Bible’s many prophecies about it. Christians disagree about the details, but they agree on the conclusion: God wins, Jesus returns, and everything broken gets made right.
Eschatology
Eschatology (ess-kuh-TOL-oh-jee) is simply the study of how everything ends.
The word sounds intimidating but the idea is straightforward. The Bible has a lot to say about the future — about Jesus coming back, about a final judgment, about a new heaven and new earth where everything broken gets made right. (Revelation 21:1–5) Eschatology is the word theologians use for all of that.
You’ve probably heard some of the specific topics that fall under this umbrella: the second coming of Christ, the rapture, the tribulation, the millennium, the final judgment. Christians disagree — sometimes loudly — about the exact order and details of those events. But they all agree on the main point: Jesus wins. History is headed somewhere, God is steering it, and the destination is good.
Why does this matter in everyday life? Because it means the world is not spinning out of control. It means suffering is not the final word. It means everything that is wrong right now will one day be set right. Knowing that changes how you live today.
If you want a one-sentence definition: eschatology is what the Bible says happens at the end of history — and the short version is that Jesus comes back and makes everything new. (Revelation 21:5)
Dispensationalism
Dispensationalism is a way of reading the Bible that divides history into different chapters, each with its own set of instructions and arrangements from God.
The word comes from dispensation, which just means a period of time during which things work a certain way. Think of it like chapters in a book — the same author tells one continuous story, but the rules and circumstances can be different in each chapter.
Dispensationalists typically identify several of these chapters in history. A common list includes: the age of innocence before sin entered the world, the age when God gave Israel his law through Moses, the age of grace (the church age we’re living in now), and a future age when Jesus reigns on earth. The exact number of dispensations varies depending on who you read.
One of the distinctive ideas in dispensationalism is that God’s promises to the nation of Israel and his promises to the church are two separate things running on two separate tracks. This shapes how dispensationalists read Old Testament prophecy and how they expect the end times to unfold. If you have ever heard terms like “the rapture,” “the seven-year tribulation,” or “the millennial kingdom” explained in detail, you were probably hearing the vocabulary of dispensationalism.
Not all Christians are dispensationalists, and sincere, Bible-believing people disagree about it without anyone’s salvation being at stake. It is one of those secondary questions where Christians hold their convictions while remaining in fellowship with those who read it differently.
Part 5 — How We Read and Defend Scripture
The Bible is the source of everything in this article. But how do you read it well? How do you know what it actually means? And how do you explain what you believe to someone who doesn’t share your faith or has honest doubts about it? These three words are practical tools — skills a Christian uses both when studying Scripture privately and when talking about it with others.
Exegesis
Exegesis (ex-ih-JEE-sis) is a fancy word for reading the Bible carefully to find out what it actually says — not what you want it to say, and not what you assumed it says before you started reading.
The word comes from Greek and means “to lead out.” The idea is that you are leading the meaning out of the text, rather than pushing your own ideas into it.
Here’s why this matters: it is very easy to read a Bible verse and immediately connect it to your own situation or your own opinion. Sometimes that connection is exactly right. But sometimes you’re missing what the verse actually meant when it was written, to the people who first read it, in the language and culture of their time.
Exegesis slows you down and asks: Who wrote this? To whom? When? What was going on in their world? What did this particular word mean in their language? What comes right before and right after this verse in the text?
A simple example: when Paul writes “I can do all things through Christ who strengthens me” (Philippians 4:13), some people take that to mean God will help them win a sports game or land a job promotion. Exegesis looks at what Paul was actually talking about — learning to be content whether he had plenty or nothing (Philippians 4:11–12) — and finds a much more specific and powerful meaning.
Good exegesis doesn’t make the Bible less meaningful. It makes it more meaningful, because you’re hearing what God actually said instead of what you assumed he said.
Hermeneutics
Hermeneutics (her-muh-NOO-tiks) is the set of rules for interpreting the Bible correctly.
If exegesis is the work of studying a passage carefully, hermeneutics is the rulebook that guides how that work gets done. Think of it like the rules of a sport. You could pick up a basketball and start playing without knowing the rules — you might have fun, but you’d get things wrong and draw some bad conclusions. Hermeneutics prevents you from playing Bible interpretation without knowing the rules.
Some basic rules that most Christians agree on:
Let the Bible interpret itself. When one passage is unclear, look for other passages that shed light on it. The clearer passages help explain the less clear ones.
Read in context. A verse pulled out of its surrounding chapter can mean something very different from what it means when you read it in context. Always look at what comes before and after. Sometimes we call this the 20/20 rule — or having 20/20 vision — meaning to read the 20 verses before and 20 verses after in order to understand the context in which the verse lives.
Know what kind of writing you’re reading. Poetry works differently from history. A prophecy works differently from a personal letter. The rules for reading a Psalm are not the same as the rules for reading the book of Acts.
Ask what it meant then, before asking what it means now. A passage cannot mean something today that it couldn’t have meant to the people who first received it. Words change meanings over time. What a word means today may not be the same meaning that the word had just a short decade ago.
Hermeneutics sounds intimidating, but you already use interpretation skills every day — any time you read a text message and think about what the person meant, not just what the words literally say, that’s interpretation. Hermeneutics is just interpretation done carefully and consistently, with the Bible.
Apologetics
Apologetics is being able to explain what you believe and why — and being ready to give a calm, honest answer to people who have questions or doubts about Christianity.
The word comes from the Greek apologia, which means a defense or a reasoned answer. In ancient Greek courts, when someone was accused of a crime, the apologia was their response to the charges. The apostle Peter used this same word when he wrote: “Always be prepared to give an answer to everyone who asks you to give the reason for the hope that you have” (1 Peter 3:15).
Apologetics is not arguing. It is not trying to win a debate or embarrass somebody into belief. It is being prepared to have an honest conversation about why you believe Christianity is true.
The kinds of questions apologetics deals with include: How do we know the Bible is reliable? Didn’t science disprove God? If God is good, why is there so much suffering in the world? Aren’t all religions basically the same? Is there any real historical evidence that Jesus lived, died, and rose from the dead?
These are fair questions. Apologetics says: Christianity does not ask you to check your brain at the door. It has real, thoughtful answers — not answers that resolve every mystery, but answers that hold up under honest scrutiny.
You don’t have to be a scholar to do apologetics. Every time a believer says, calmly and clearly, “Here’s why I believe what I believe” — that’s apologetics.
Part 6 — How We Live It Out Together
Christianity was never meant to be practiced alone. These two words describe two communities every Christian belongs to at once: the church (a community of people) and life in the Holy Spirit (a relationship with God’s ongoing presence). Ecclesiology asks how the church works. Pneumatology asks who the Holy Spirit is and what he does in and among believers. Both matter because the Christian life is not a solo act.
Ecclesiology
Ecclesiology (ih-klee-zee-OL-oh-jee) is the study of the church — what it is, what it’s for, and how it’s supposed to work.
The word comes from the Greek ekklesia, which means “assembly” or “called-out ones.” The church, in the biblical sense, is not a building. It is a community of people who follow Jesus.
Ecclesiology asks questions like: Why does the church exist? What should happen when Christians gather together? How should a church be organized and led? What is the point of baptism and communion? What does a church owe its members, and what do members owe the church?
Christians have answered these questions in a lot of different ways, which is part of why there are so many different denominations and styles of worship. Some churches have a bishop who oversees many congregations. Others are led by a group of elders. Others put most of the authority in the hands of the congregation itself. Some baptize infants; others only baptize people who have made a personal profession of faith. Some worship services are formal and follow a set order every week; others are relaxed and spontaneous. Ecclesiology is the careful thinking about all of those differences and what Scripture actually says about them.
But underneath all the differences, most Christians agree on the core purpose: the church exists to worship God, teach the Bible, care for one another, and tell the world about Jesus. (Acts 2:42; Matthew 28:19–20) Ecclesiology is the study of how to do all of that well.
Pneumatology
Pneumatology (nyoo-muh-TOL-oh-jee) is the study of the Holy Spirit — who he is and what he does.
The word comes from pneuma, the Greek word for breath or spirit. The Holy Spirit is the third person of the Trinity — not a force or a feeling or an atmosphere, but a person: fully God, just as the Father and the Son are fully God.
The Holy Spirit appears in the very first verses of the Bible, hovering over the waters of creation. (Genesis 1:2) He speaks through the prophets throughout the Old Testament. And after Jesus rose from the dead and returned to heaven, he sent the Holy Spirit to live inside every person who trusts in him. (John 14:16–17)
What does the Holy Spirit actually do? Quite a lot, according to the Bible:
He convicts people of sin — that uncomfortable, nagging feeling that something you did was wrong is often the Spirit at work. (John 16:8) He lives inside believers permanently, not just visiting on occasion. (Romans 8:9) He helps Christians understand the Bible when they read it. (John 16:13) He prays for believers when they don’t know what words to use. (Romans 8:26) He gives spiritual gifts — particular abilities and callings — to individuals for the good of the whole church. (1 Corinthians 12:4–11) And he produces fruit in a believer’s life over time: love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, and self-control. (Galatians 5:22–23)
When Christians talk about “feeling the presence of God” or “being led by the Spirit,” pneumatology is the careful biblical thinking behind those experiences — who exactly is doing the leading, and how it works.