John 20:30 Jesus performed many other signs in the presence of his disciples, which are not recorded in this book. 31 But these are written that you may believe [or may continue to believe] that Jesus is the Messiah, the Son of God, and that by believing you may have life in his name.
“Jesus comes to us and gives us his peace with God. Then he gives us power to do the kinds of things that mere humans can’t do — like defeating our own selfishness, and loving other people, and treasuring Christ above all. And then with that peace and that power he gives us our central purpose for existence” John Piper