Catechism of the Catholic Church

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." (253)