Secondly, for contrariety of wills it is necessary that it should be in the same will. For if a man wishes one thing with his rational appetite, and wishes another thing with his sensitive appetite, there is no contrariety, unless the sensitive appetite so far prevailed as to change or at least keep back the rational appetite; for in this case something of the contrary movement of the sensitive appetite would reach the rational will.
And hence it must be said that although the natural and the sensitive will in Christ wished what the Divine will did not wish, yet there was no contrariety of wills in Him. First, because neither the natural will nor the will of sensuality rejected the reason for which the Divine will and the will of the human reason in Christ wished the passion. For the absolute will of Christ wished the salvation of the human race, although it did not pertain to it to will this for the sake of something further; but the movement of sensuality could nowise extend so far. Secondly, because neither the Divine will nor the will of reason in Christ was impeded or retarded by the natural will or the appetite of sensuality. So, too, on the other hand, neither the Divine will nor the will of reason in Christ shrank from or retarded the movement of the natural human will and the movement of the sensuality in Christ. For it pleased Christ, in His Divine will, and in His will of reason, that His natural will and will of sensuality should be moved according to the order of their nature. Hence it is clear that in Christ there was no opposition or contrariety of wills.
Reply Obj. 1: The fact of any will in Christ willing something else than did the Divine will, proceeded from the Divine will, by whose permission the human nature in Christ was moved by its proper movements, as Damascene says (De Fide Orth. ii, 15, 18, 19).
Reply Obj. 2: In us the desires of the spirit are impeded or retarded by the desires of the flesh: this did not occur in Christ. Hence in Christ there was no contrariety of flesh and spirit, as in us.
Reply Obj. 3: The agony in Christ was not in the rational soul, in as far as it implies a struggle in the will arising from a diversity of motives, as when anyone, on his reason considering one, wishes one thing, and on its considering another, wishes the contrary. For this springs from the weakness of the reason, which is unable to judge which is the best simply. Now this did not occur in Christ, since by His reason He judged it best that the Divine will regarding the salvation of the human race should be fulfilled by His passion. Nevertheless, there was an agony in Christ as regards the sensitive part, inasmuch as it implied a dread of coming trial, as Damascene says (De Fide Orth. ii, 15; iii, 18, 23). _______________________
QUESTION 19
OF THE UNITY OF CHRIST'S OPERATION
(In Four Articles)
We must now consider the unity of Christ's operation; and under this head there are four points of inquiry:
(1) Whether in Christ there was one or several operations of the Godhead and Manhood?
(2) Whether in Christ there were several operations of the human nature?