The shortest biblical answer is love. God sent Jesus because he loved a world that had turned away from him and would not abandon it to the consequences (John 3:16-17). Jesus came to show people what God is actually like, to rescue them from sin and death, and to begin putting a broken creation right. He was not sent to condemn the world but to save it.
Behind that lies a longer story. From Genesis onward, scripture presents God as making promises: to Abraham that all nations would be blessed through his family, to David that one of his descendants would reign forever, and through the prophets that God himself would one day come to his people. Jesus is presented as the point where all those promises land at once.
To reveal God
The Gospel of John opens by calling Jesus the Word who was with God and was God, and then says that no one has ever seen God, but the Son has made him known (John 1:1, 1:18). Jesus tells Philip that whoever has seen him has seen the Father (John 14:9). Paul calls him the image of the invisible God (Colossians 1:15), and Hebrews calls him the exact representation of God's being (Hebrews 1:3). The claim is that if you want to know what God is like, you look at Jesus: how he treats outsiders, the sick, children, enemies and sinners.
To fulfil the promises
Matthew's Gospel opens with a genealogy running through Abraham and David precisely to say that the old promises are now being kept (Matthew 1:1). Luke records Jesus reading Isaiah 61 in the Nazareth synagogue and declaring it fulfilled that day (Luke 4:16-21). Paul's summary is that all God's promises find their yes in Christ (2 Corinthians 1:20). The prophets had spoken of a servant who would suffer for others (Isaiah 53), a shepherd-king (Ezekiel 34:23), and a new covenant written on the heart (Jeremiah 31:31-34). The New Testament writers read Jesus as the answer to each.
To save from sin and death
The angel tells Joseph to name the child Jesus (Hebrew Yeshua, meaning the Lord saves) because he will save his people from their sins (Matthew 1:21). Jesus describes his own mission as seeking and saving the lost (Luke 19:10) and giving his life as a ransom for many (Mark 10:45). Paul writes that Christ Jesus came into the world to save sinners (1 Timothy 1:15). The fuller mechanics of this are the subject of Question 5.
To defeat evil and restore creation
John writes that the Son of God appeared to destroy the devil's work (1 John 3:8). Hebrews says he shared in human flesh so that by his death he might break the power of the one who holds the power of death (Hebrews 2:14-15). Paul sees the goal as nothing less than reconciling all things, in heaven and on earth, to God (Colossians 1:19-20), and Romans 8 pictures creation itself waiting to be set free from decay.
To inaugurate God's kingdom
Jesus' first recorded words in Mark are that the time has come and the kingdom of God is near (Mark 1:15). His healings, exorcisms and table fellowship with outcasts are signs that God's rule is breaking in. He sends his followers out to continue the same work (Matthew 28:18-20).
An early Christian conviction
Paul's letters already describe Jesus as sent by God for salvation (Galatians 4:4-5; Romans 8:3). These are first-century witnesses to Christian belief, considerably earlier than the later councils. An early belief is evidence about what the movement believed; its date alone does not establish that every theological claim is true.
Sources and reading notes
Scripture references identify the passages behind the explanation. New Testament and available Old Testament links open the site's World English Bible reader. The prose here is commentary and paraphrase, not a continuous quotation from a named modern Bible translation. References outside the selected collection can be checked in another Bible.
- Catholic Catechism, paragraphs 456–483: Incarnation, humanity and divinity (a primary statement of this tradition, not a neutral historical verdict).
- Dale Martin, Yale: From Stories to Canon (a historical-critical treatment of Gospel sources).
- Dale Martin, Yale: The Historical Jesus (historical method and its limits).
Primary historical references in the collection include Josephus, Antiquities 18.3.3 and 20.9.1; Tacitus, Annals 15.44; and Pliny, Letters 10.96. Their dates and purposes differ. Josephus's longer Jesus passage requires special textual caution. These sources do not independently establish Christian supernatural claims.
Scripture references support the explanation; they do not make every historical interpretation settled. See our method and review status.