CCC 590

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, Cf.Mt 12:6, 0, 36, 37, 41-42. and his affirmations, "Before Abraham was, I AM", and even "I and the Father are one." Jn 8:58; 10:30.

Read the full chapter 2. I Believe in Jesus Christ, the Only Son of God ¶422–682