Reply Obj. 1: By union with the Person, the Man receives omnipotence in time, which the Son of God had from eternity; the result of which union is that as the Man is said to be God, so is He said to be omnipotent; not that the omnipotence of the Man is distinct (as neither is His Godhead) from that of the Son of God, but because there is one Person of God and man.
Reply Obj. 2: According to some, knowledge and active power are not in the same ratio; for an active power flows from the very nature of the thing, inasmuch as action is considered to come forth from the agent; but knowledge is not always possessed by the very essence or form of the knower, since it may be had by assimilation of the knower to the thing known by the aid of received species. But this reason seems not to suffice, because even as we may understand by a likeness obtained from another, so also may we act by a form obtained from another, as water or iron heats, by heat borrowed from fire. Hence there would be no reason why the soul of Christ, as it can know all things by the similitudes of all things impressed upon it by God, cannot do these things by the same similitudes.
It has, therefore, to be further considered that what is received in the lower nature from the higher is possessed in an inferior manner; for heat is not received by water in the perfection and strength it had in fire. Therefore, since the soul of Christ is of an inferior nature to the Divine Nature, the similitudes of things are not received in the soul of Christ in the perfection and strength they had in the Divine Nature. And hence it is that the knowledge of Christ's soul is inferior to Divine knowledge as regards the manner of knowing, for God knows (things) more perfectly than the soul of Christ; and also as regards the number of things known, since the soul of Christ does not know all that God can do, and these God knows by the knowledge of simple intelligence; although it knows all things present, past, and future, which God knows by the knowledge of vision. So, too, the similitudes of things infused into Christ's soul do not equal the Divine power in acting, i.e. so as to do all that God can do, or to do in the same manner as God does, Who acts with an infinite might whereof the creature is not capable. Now there is no thing, to know which in some way an infinite power is needed, although a certain kind of knowledge belongs to an infinite power; yet there are things which can be done only by an infinite power, as creation and the like, as is plain from what has been said in the First Part (Q. 45). Hence Christ's soul which, being a creature, is finite in might, can know, indeed, all things, but not in every way; yet it cannot do all things, which pertains to the nature of omnipotence; and, amongst other things, it is clear it cannot create itself.
Reply Obj. 3: Christ's soul has practical and speculative knowledge; yet it is not necessary that it should have practical knowledge of those things of which it has speculative knowledge. Because for speculative knowledge a mere conformity or assimilation of the knower to the thing known suffices; whereas for practical knowledge it is required that the forms of the things in the intellect should be operative. Now to have a form and to impress this form upon something else is more than merely to have the form; as to be lightsome and to enlighten is more than merely to be lightsome. Hence the soul of Christ has a speculative knowledge of creation (for it knows the mode of God's creation), but it has no practical knowledge of this mode, since it has no knowledge operative of creation. _______________________
SECOND ARTICLE [III, Q. 13, Art. 2]
Whether the Soul of Christ Had Omnipotence with Regard to the
Transmutation of Creatures?
Objection 1: It would seem that the soul of Christ had omnipotence with regard to the transmutation of creatures. For He Himself says (Matt. 28:18): "All power is given to Me in heaven and on earth." Now by the words "heaven and earth" are meant all creatures, as is plain from Gen. 1:1: "In the beginning God created heaven and earth." Therefore it seems that the soul of Christ had omnipotence with regard to the transmutation of creatures.
Obj. 2: Further, the soul of Christ is the most perfect of all creatures. But every creature can be moved by another creature; for Augustine says (De Trin. iii, 4) that "even as the denser and lower bodies are ruled in a fixed way by the subtler and stronger bodies; so are all bodies by the spirit of life, and the irrational spirit of life by the rational spirit of life, and the truant and sinful rational spirit of life by the rational, loyal, and righteous spirit of life." But the soul of Christ moves even the highest spirits, enlightening them, as Dionysius says (Coel. Hier. vii). Therefore it seems that the soul of Christ has omnipotence with regard to the transmutation of creatures.
Obj. 3: Further, Christ's soul had in its highest degree the "grace of miracles" or works of might. But every transmutation of the creature can belong to the grace of miracles; since even the heavenly bodies were miraculously changed from their course, as Dionysius proves (Ep. ad Polycarp). Therefore Christ's soul had omnipotence with regard to the transmutation of creatures.
On the contrary, To transmute creatures belongs to Him Who preserves them. Now this belongs to God alone, according to Heb. 1:3: "Upholding all things by the word of His power." Therefore God alone has omnipotence with regard to the transmutation of creatures. Therefore this does not belong to Christ's soul.