The Westminster Shorter Catechism
Question 21 – Who is the Redeemer of God’ s elect?
The only Redeemer of God’ s elect is the Lord Jesus Christ, (1 Tim. 2:5–6) who, being the eternal Son of God, became man, (John 1:14, Gal. 4:4) and so was, and continueth to be, God and man in two distinct natures, and one person, for ever. (Rom. 9:5, Luke 1:35, Col. 2:9, Heb. 7:24–25)
Question 22 – How did Christ, being the Son of God, become man?
Christ, the Son of God, became man, by taking to himself a true body, (Heb. 2:14,16, Heb. 10:5) and a reasonable soul, (Matt. 26:38) being conceived by the power of the Holy Ghost, in the womb of the Virgin Mary, and born of her, (Luke 1:27,31,35,42, Gal. 4:4) yet without sin. (Heb. 4:15, Heb. 7:26)