It is generally known that the Lord was divine and human, divine because of Jehovah the Father and human because of the Virgin Mary. That is why he was God and a human being and therefore had a divine essence and a human outward nature, the divine essence from his Father and the human nature from his mother. This meant that he was equal to the Father with respect to his divinity, but less than the Father with respect to his humanity. It also meant that, as we are taught by the so-called Athanasian statement of faith, this human nature from his mother was not changed into or mixed with a divine essence, since a human nature cannot be changed into or mixed with a divine essence.
All the same, this very statement of faith we have accepted says that the divine nature took on a human nature—that is, united itself with it as a soul with its body, so much so that they were not two but one person. It follows from this that he took off the human nature received from his mother, which was essentially like that of anyone else and therefore material, and put on a human nature from his Father, which was essentially like his divine nature and therefore substantial, thus making his human nature divine.
That is why the Lord is even called “Jehovah” and “God” in the prophetic books of the Word, and in the Word of the Gospels is called “Lord,” “God,” “Messiah” or “Christ,” and “the Son of God,” the one in whom we are to believe and by whom we are to be saved.
Now, since from the beginning the Lord had a human nature from his mother and took this off step by step, while he was in this world he therefore experienced two states, one called the state of being brought low or being emptied out and one called the state of being glorified or united with the Divine called “the Father.” The state of being brought low occurred when and to the extent that he was primarily conscious of the human nature received from his mother, and the state of being glorified occurred when and to the extent that he was primarily conscious of the human nature received from his Father.
In his state of being brought low he prayed to the Father as someone other than himself; while in his state of being glorified he talked with the Father as if talking with himself. In this latter state he said that the Father was in him and he in the Father and that the Father and he were one; while in his state of being brought low he bore trials, suffered on the cross, and prayed that the Father would not forsake him.This is because his divine nature could not be subject to any trial, let alone suffer on the cross.
These passages then show us that by means of his trials and the subsequent constant victories, and by means of his suffering on the cross, which was the final trial, he completely subdued the hells and completely glorified his human nature, as has been explained above.
From The Lord, Section 35