"Have this mind in you, which was also in Christ Jesus: who, existing in the form of God, counted not the being on an equality with God a thing to be grasped, but emptied himself, taking the form of a servant, being made in the likeness of men; and being found in fashion as a man, he humbled himself, becoming obedient even unto death, yea, the death of the cross.
Wherefore also God highly exalted him, and gave unto him the name which is above every name; that in the name of Jesus every knee should bow, of things in heaven and things on earth and things under the earth, and that every tongue should confess that Jesus Christ is Lord, to the glory of God the Father." Phil 2:5-11
"This emptying is the same as the abasement, as to which we shall see afterwards. The expression, however, is used, ευμφατικωτέρως, (more emphatically,) to mean, — being brought to nothing. Christ, indeed, could not divest himself of Godhead; but he kept it concealed for a time, that it might not be seen, under the weakness of the flesh. Hence he laid aside his glory in the view of men, not by lessening it, but by concealing it.
It is asked, whether he did this as man? Erasmus answers in the affirmative. But where was the form of God before he became man? Hence we must reply, that Paul speaks of Christ wholly, as he was God manifested in the flesh, 1 Tim 3:16, but, nevertheless, this emptying is applicable exclusive to his humanity, as if I should say of man, “Man being mortal, he is exceedingly senseless if he thinks of nothing but the world,” I refer indeed to man wholly; but at the same time I ascribe mortality only to a part of him, namely, to the body.
As, then, Christ has one person, consisting of two natures, it is with propriety that Paul says, that he who was the Son of God, — in reality equal to God, did nevertheless lay aside his glory, when he in the flesh manifested himself in the appearance of a servant.
It is also asked, secondly, how he can be said to be emptied, while he, nevertheless, invariably proved himself, by miracles and excellences, to be the Son of God, and in whom, as John testifies, there was always to be seen a glory worthy of the Son of God? John 1:14
I answer, that the abasement of the flesh was, notwithstanding, like a veil, by which his divine majesty was concealed. On this account he did not wish that his transfiguration should be made public until after his resurrection; and when he perceives that the hour of his death is approaching, he then says, Father, glorify thy Son. John 17:1
Hence, too, Paul teaches elsewhere, that he was declared to be the Son of God by means of his resurrection. Romans 1:4. He also declares in another place, 2 Cor 13:4, that he suffered through the weakness of the flesh... the image of God shone forth in Christ in such a manner, that he was, at the same time, abased in his outward appearance, and brought down to nothing in the estimation of men; for he carried about with him the form of a servant, and had assumed our nature, expressly with the view of his being a servant of the Father, nay, even of men.
For Paul means that he had been brought down to the level of mankind, so that there was in appearance nothing that differed from the common condition of mankind, inasmuch as Paul is treating here simply of the manner in which Christ manifested himself, and the condition with which he was conversant when in the world.
Let one be truly man, he will nevertheless be reckoned unlike others, if he conducts himself as if he were exempt from the condition of others. Paul declares that it was not so as to Christ, but that he lived in such a manner, that he seemed as though he were on a level with mankind, and yet he was very different from a mere man, although he was truly man."