What does the Bible say about belief in Jesus?

Belief in Jesus is foundational to the Christian faith, as expressed in John 20:31, which states, 'but these are written that you might believe.' The content of that belief is crucial; it centers on who Jesus is—God the Son, the Messiah, and the Savior. Jesus himself affirmed this in John 11:25-26, where he declared, 'I am the resurrection and the life; he that believeth in me, though he were dead, yet shall he live.' This conveys that true belief involves recognizing Jesus' divine nature and His work of salvation.