Council of Toledo XI, 675

by reason nor illustrated by example, because if grasped by reason, it is not miraculous; if illustrated by example, it will not be unique.¹ Yet we must not believe that the Holy Spirit is Father of the Son, because of the fact that Mary conceived by the overshadowing of the same Holy Spirit, lest we seem to assert that there are two Fathers of the Son,

283. which is certainly impious to say.—In this marvelous conception, with Wisdom building a house for herself, the Word was made flesh and dwelt among us [John 1:14]. The Word itself, however, was not so converted and changed that He who willed to become man ceased to be God; but the Word was made flesh in such a way that not only are the Word of God and the flesh of man present, but also the soul of a rational man, and this whole is called God on account of God, and man on account of man. In this Son of God we believe there are two natures, one of divinity, the other of humanity, which the one person of Christ so united in Himself that the divinity can never be separated from the humanity, nor the humanity from the divinity. Christ, therefore, is perfect God and perfect man in the unity of one person; but it does not follow, because we have asserted two natures in the Son, that there are two persons in Him, lest—which God forbid—a quaternity be predicated of the Trinity. For God the Word has not received the person of man, but the nature, and to the eternal person of divinity He has united the

284. temporal substance of flesh.—Likewise we believe that the Father, the Son, and the Holy Spirit are of one substance, but we do not say that the Virgin Mary gave birth to the unity of the Trinity, but only to the Son, who alone assumed our nature in the unity of His person. Also, we must believe that the entire Trinity accomplished the Incarnation of the Son of God, because the works of the Trinity are inseparable. However, only the Son took the form of a servant [cf. Phil. 2:7] in the singleness of His person, not in the unity of His divine nature; in what is proper to the Son, not in what is common to the Trinity; and this form was adapted to Him for unity of person so that the Son of God and the Son of man is one Christ, that is, Christ in these two natures exists in three substances; of the Word, which must refer to the essence of God alone, of the body, and of the soul, which pertain to true man.

285. He has, therefore, in Himself the twofold substance of His divinity and our humanity. We understand, however, that by the fact that He proceeded from God the Father without beginning, He was born only, for He was neither made nor predestined; by the fact, however, that He was born of the Virgin Mary, we must believe that He was born, made, and predestined. Yet both births in Him are marvelous, because He was both begotten by the Father without a mother before all ages and in the end of the ages He was born of a mother without a father; He who,