In consideration of Numbers 23:19, can God be a human? (Catholic perspective) In the King James Version of the Bible, it is mentioned in Num. 23:19 that God is not a human:


  19 God is not a man, that he should lie; neither the son of man, that he should repent: hath he said, and shall he not do it? or hath he spoken, and shall he not make it good? KJV, 1769


Now we know that Jesus was a man, being the son of Mary. So, based on Num. 23:19, how can he also be God? I am requesting a Catholic perspective.
Numbers 23:19 doesn't say Yahweh cannot become a human, only that he isn't like humans, who do lie or fail to keep promises. Yahweh is essentially saying he can be trusted. A Catholic perspective teaches that Jesus is fully divine and fully human, and that these two natures are in hypostatic union.

The sinful state would lead humans to sin, but Jesus' humanity can be thought of as Adam's before he disobeyed Yahweh. Thus, being the incarnation of the divine word, Jesus obeyed perfectly even up to his time of death.