se they believed that Christ's
human nature never moved with its own motion, but only inasmuch as it
was moved by the Godhead, as is plain from the synodical letter of
Pope Agatho [*Third Council of Constantinople, Act. 4].

And hence in the sixth Council held at Constantinople [*Act. 18] it
was decreed that it must be said that there are two wills in Christ,
in the following passage: "In accordance with what the Prophets of
old taught us concerning Christ, and as He taught us Himself, and the
Symbol of the Holy Fathers has handed down to us, we confess two
natural wills in Him and two natural operations." And this much it
was necessary to say. For it is manifest that the Son of God assumed
a perfect human nature, as was shown above (Q. 5; Q. 9, A. 1). Now
the will pertains to the perfection of human nature, being one of its
natural powers, even as the intellect, as was stated in the First
Part (QQ. 79, 80). Hence we must say that the Son of God assumed a
human will, together with human nature. Now by the assumption of
human nature the Son of God suffered no diminution of what pertains
to His Divine Nature, to which it belongs to have a will, as was said
in the First Part (Q. 19, A. 1). Hence it must be said that there are
two wills in Christ, i.e. one human, the other Divine.

Reply Obj. 1: Whatever was in the human nature of Christ was moved at
the bidding of the Divine will; yet it does not follow that in Christ
there was no movement of the will proper to human nature, for the
good wills of other saints are moved by God's will, "Who worketh" in
them "both to will and to accomplish," as is written Phil. 2:13. For
although the will cannot be inwardly moved by any creature, yet it
can be moved inwardly by God, as was said in the First Part (Q. 105,
A. 4). And thus, too, Christ by His human will followed the Divine
will according to Ps. 39:9; "That I should do Thy will, O my God, I
have desired it." Hence Augustine says (Contra Maxim. ii, 20): "Where
the Son says to the Father, 'Not what I will, but what Thou willest,'
what do you gain by adding your own words and saying 'He shows that
His will was truly subject to His Father,' as if we denied that man's
will ought to be subject to God's will?"

Reply Obj. 2: It is proper to an instrument to be moved by the
principal agent, yet diversely, according to the property of its
nature. For an inanimate instrument, as an axe or a saw, is moved by
the craftsman with only a cor