He who was to be the son of David in his human nature was to be the Son of God in power through the action of the Spirit of holiness, for he was born of the Holy Spirit and of the Virgin Mary. This unique taking to himself of a human nature by God the Word came about in such a way, too mysterious for our understanding, that with truth and accuracy the Word could be called at one and the same time the Son of God and the son of man: son of man because of the human nature that was taken, and Son of God because it was the only-begotten God who took that human nature. We are not to believe in God as a quaternity but as a trinity. Human nature was in this case predestined to so marvelous, so sublime, so perfect a dignity that it could not be raised higher; just as the divine nature itself could not demean itself any lower than by taking human nature with all its weakness, even to dying on a cross. Just as one Christ was predestined to be our head, so we, the many, were predestined to be his members. Let there be no mention here of human merits; they were lost through Adam. Let God’s grace reign supreme, as it does through Jesus Christ, our Lord, the only Son of God, the one Lord. If anyone can find in Christ, our head, any merits preceding his unique birth, he may look also for merits in ourselves preceding our rebirth as his many members.