Did Christ become the Son of God when He was born?

It is being taught in some quarters that our Lord was “God the Son in eternity,” and became the “Son of God in incarnation.”

Is this distinction scriptural?

I do not know where the phrase, “God the Son,” occurs in Scripture, though no serious objection need be raised to it. As a Trinitarian Person He was God the Son, but THEN, too, He was in the relation of Son to the Father, and was therefore Son of God. There are those who deny the Eternal Sonship of Christ, which is a very serious error, but clearly the teacher referred to here admits this important truth.

But I believe it is unscriptural to limit the expression “Son of God” to incarnation. To the Son He saith, “Thy throne, 0 God, is for ever and ever,” and to the Son also, “Thou, Lord, in the beginning hast laid the foundation of the earth” (Hebrews 1:8-10)—uttered to the Lord centuries before His incarnation. I doubt if the Sonship of Christ is ever made to depend on His incarnation. He was CALLED the Son of God’ in incarnation, because He was the Son of God before incarnation (Luke 1:35), just as the “Son given” is called “Wonderful, Counsellor, the Mighty God,” because He was all this before being “the child, born” of the virgin (Isaiah 9:6). The above teacher has been referred to as to the phrase this question is based on, and he replies that what he intended to be printed was, “Christ was God the Son in eternity, and became the Son of God as Man,” which seems only to mean that personally He was unchanged, but now as Son of God He entered into Manhood and became changed in condition.