"Friendship with Jesus Christ" is a frequent theme of his preaching. He stressed that on this intimate friendship, "everything depends." He also said: "We are all called to open ourselves to this friendship with God... speaking to him as to a friend, the only One who can make the world both good and happy... That is all we have to do is put ourselves at his disposal...is an extremely important message. It is a message that helps to overcome what can be considered the great temptation of our time: the claim, that after the Big Bang, God withdrew from history." Thus, in his book "Jesus of Nazareth", his main purpose was "to help foster the reader the growth of a living relationship" with Jesus Christ.