Introduction
Christianity is the religion centered on the person of Jesus Christ. Christians believe he is the Son of God, who died on the cross to forgive human sin and then rose from the dead. They receive this salvation by faith, read the Bible, and gather in the church to live this faith together.
More than two billion people around the world call themselves Christians, on every continent and in every culture. Yet many people do not really know what this faith claims. This page offers a clear definition, based on what the Bible itself teaches. You will see where the word comes from, what the core points of Christian faith are, how the main Christian traditions relate to one another, and what it changes in everyday life.
Where Does the Word Christianity Come From?
The word comes from Christ, the Greek form of a Hebrew term, Messiah, which means “the anointed one.” In ancient times, oil was poured on kings and priests to set them apart. The first disciples recognized in Jesus of Nazareth the Messiah promised for centuries: he is Jesus the Christ.
The name Christian first appears about fifteen years after Jesus' death, in the city of Antioch, in what is today Turkey. It simply referred to those who belonged to Christ. So Christianity is first of all a relationship with a person before it is a list of rules or a culture.
What Do Christians Believe, According to the Bible?
The heart of Christian faith comes down to a few statements that the Bible repeats. Here are the passages that support them.
Acts 11:26
"When he had found him, he brought him to Antioch. For a whole year they were gathered together with the assembly, and taught many people. The disciples were first called Christians in Antioch."
This verse explains when Jesus' disciples received their name. Notice that they met together and taught one another for a whole year: from the very beginning, Christian faith was lived in community. Read all of Acts 11.
John 3:16
"For God so loved the world, that he gave his one and only Son, that whoever believes in him should not perish, but have eternal life."
This is the best-known summary of the gospel. God takes the initiative out of love, he gives his Son, and each person is invited to respond with trust. The word “world” shows that the offer is not limited to one people or one country. Read all of John 3.
1 Corinthians 15:3-4
"For I delivered to you first of all that which I also received: that Christ died for our sins according to the Scriptures, that he was buried, that he was raised on the third day according to the Scriptures,"
The apostle Paul recalls the central message here: Christ's death for human sins, his burial, and his resurrection. Without this resurrection, Christians say, there would be no Christianity. Read all of 1 Corinthians 15.
Romans 10:9
"that if you will confess with your mouth that Jesus is Lord, and believe in your heart that God raised him from the dead, you will be saved."
This passage describes the person's response: to acknowledge Jesus as Lord, meaning the one who has authority over your life, and to believe that he is alive. Salvation is presented as a promise, not as an achievement. Read all of Romans 10.
Ephesians 2:8-9
"for by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, that no one would boast."
Here the Bible makes clear that salvation is not a wage. It is a gift from God, called grace, received through faith. Good works follow, but they are not used to buy forgiveness. Read all of Ephesians 2.
Matthew 22:37-39
"Jesus said to him, “ ‘You shall love the Lord your God with all your heart, with all your soul, and with all your mind.’ This is the first and great commandment. A second likewise is this, ‘You shall love your neighbor as yourself."
Asked about the greatest commandment, Jesus answers with two: love God and love your neighbor. The whole Christian life unfolds between these two loves. Read all of Matthew 22.
Catholics, Protestants, Orthodox, Evangelicals: What's the Difference?
Over the centuries, Christianity has organized itself into several major families. Orthodox Christians are mainly found in Eastern Europe and the Middle East. Catholics gather around the bishop of Rome, called the pope. Protestants come from the Reformation of the sixteenth century. Evangelicals are a Protestant movement that stresses personal conversion and the authority of the Bible.
All these families confess Jesus Christ, who died and rose again, and they receive the Bible, even if they do not present it in exactly the same way. They differ on how the church is organized, the place of tradition, or how the sacraments are celebrated. These disagreements are real, and each one deserves to be explained with respect rather than harshness.
Common Misconceptions About Christianity
First misconception: that Christianity means being a good person. Christians affirm instead that no one can become righteous by their own efforts, and that forgiveness is offered freely. Morality flows from this grace; it does not come before it.
Second misconception: thinking Christian faith is just a culture or a nationality. It was born in the Middle East, it is lived today in Africa, Asia, the Americas and Europe, and each people receives it in its own language.
Third misconception: imagining that believing means closing your eyes to questions. The Bible invites people to seek, to question, and to test what they hear. Many Christians were first sincere skeptics.
How Do You Live the Christian Faith Day to Day?
Start by talking to God simply, in your own words. Prayer requires no set formula: it is a conversation with someone who listens. A few minutes each day is enough to build the habit.
Read the Bible a little each day, starting with one of the four Gospels, such as the Gospel of John. They tell the story of Jesus and let you discover him directly.
Join a local church community. An isolated Christian can easily lose heart, while together people encourage one another, learn, and serve.
Finally, let your faith show in simple actions: forgiving, telling the truth, helping a neighbor. This is how love for others becomes visible.
Further reading
Frequently Asked Questions
What is the difference between Christianity and Catholicism?
Christianity refers to all people who follow Jesus Christ. Catholicism is one of its major families, along with the Orthodox and Protestant churches. They all share faith in Jesus, who died and rose again, but they differ on how the church is organized and on certain practices.
When did Christianity begin?
It began in the first century, after the resurrection of Jesus, which Christians place around the year 30 in Jerusalem. It then spread quickly across the Mediterranean world through the travels of the apostles, and eventually around the globe over the centuries.
How does someone become a Christian?
The Bible describes a simple path: recognizing that you need God's forgiveness, believing that Jesus died and rose again for you, and entrusting your life to him. Many Christians express this decision in prayer, and later through baptism.
Do Christians believe in three gods?
No. Christians affirm that there is only one God, who reveals himself as Father, Son, and Holy Spirit. This mystery is called the Trinity. It expresses one God who is at the same time relationship, love, and communion.