There are three persons in the Godhead, the same in substance, equal in power and glory; although distinguished by their personal properties.
The only Mediator of the covenant of grace is the Lord Jesus Christ, who, being the eternal Son of God, of one substance and equal with the Father, in the fulness of time became man, and so was and continues to be God and man, in two entire distinct natures, and one person, forever.
Christ the Son of God became man, by taking to himself a true body, and a reasonable soul, being conceived by the power of the Holy Ghost in the womb of the virgin Mary, of her substance, and born of her, yet without sin.
Christ humbled himself in his conception and birth, in that, being from all eternity the Son of God, in the bosom of the Father, he was pleased in the fulness of time to become the son of man, made of a woman of low estate, and to be born of her; with divers circumstances of more than ordinary abasement.
Christ humbled himself in his life, by subjecting himself to the law, which he perfectly fulfilled; and by conflicting with the indignities of the world, temptations of Satan, and infirmities in his flesh, whether common to the nature of man, or particularly accompanying that his low condition.
Christ humbled himself in his death, in that having been betrayed by Judas, forsaken by his disciples, scorned and rejected by the world, condemned by Pilate, and tormented by his persecutors; having also conflicted with the terrors of death, and the powers of darkness, felt and borne the weight of God's wrath, he laid down his life an offering for sin, enduring the painful, shameful, and cursed death of the cross.