III. JESUS AND ISRAEL'S FAITH IN THE ONE GOD AND SAVIOUR
Only the divine identity of Jesus' person can justify so absolute a claim as "He who is not with me is against me"; and his saying that there was in him "something greater than Jonah,. . . Greater than Solomon", something "greater than the Temple"; his reminder that David had called the Messiah his Lord, and his affirmations, "Before Abraham was, I AM", and even "I and the Father are one."
Source: Catechism of the Catholic Church (Vatican.va)