From the Brief Statement of 1932
8. We teach that in the fullness of time the eternal Son of God was made man by assuming, from the Virgin Mary through the operation of the Holy Ghost, a human nature like unto ours, yet without sin, and receiving it unto His divine person. Jesus Christ is therefore “true God, begotten of the Father from eternity, and also true man, born of the Virgin Mary,” true God and true man in one undivided and indivisible person. The purpose of this miraculous incarnation of the Son of God was that He might become the Mediator between God and men, both fulfilling the divine Law and suffering and dying in the place of mankind. In this manner God reconciled the whole sinful world unto Himself, Gal. 4:4, 5; 3:13; 2 Cor. 5:18, 19.