Why did Jesus come to the world? The historical Jesus and Four Gospels

A brief introduction to Jesus and the Four Gospels.
Why did he come to the world according to the Four Gospels? -According to Mark, Jesus came not to be served but to serve, and to give his life a ransom for many (Mark 10:45). -According to Matthew, he came to fulfill the righteousness of God (Matt 5:17). -According to Luke, he came to seek out and save the lost (Luke 19:10). -According to John, he came to testify to the truth of God (John 18:37).