How did Christ, being the Son of God, become man?

Answer

Christ, the Son of God, became man by taking to Himself a true body (), and a reasonable soul (; ), being conceived by the power of the Holy Spirit in the Virgin Mary, and was born of her (), yet without sin ().

Read the 5 proof texts (KJV)

Hebrews 2:14: Forasmuch then as the children are partakers of flesh and blood, he also himself likewise took part of the same; that through death he might destroy him that had the power of death, that is, the devil;
Matthew 26:38: Then saith he unto them, My soul is exceeding sorrowful, even unto death: tarry ye here, and watch with me.
Hebrews 4:15: For we have not an high priest which cannot be touched with the feeling of our infirmities; but was in all points tempted like as [we are, yet] without sin.
Luke 1:31,35: ³¹And, behold, thou shalt conceive in thy womb, and bring forth a son, and shalt call his name JESUS. ³⁵And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God.
Hebrews 7:26: For such an high priest became us, [who is] holy, harmless, undefiled, separate from sinners, and made higher than the heavens;