Incarnation

that act of grace whereby Christ took our human nature into
union with his Divine Person, became man. Christ is both God and
man. Human attributes and actions are predicated of him, and he
of whom they are predicated is God. A Divine Person was united
to a human nature (Acts 20:28; Rom. 8:32; 1 Cor. 2:8; Heb.
2:11-14; 1 Tim. 3:16; Gal. 4:4, etc.). The union is
hypostatical, i.e., is personal; the two natures are not mixed
or confounded, and it is perpetual.