Whether there is anything voluntary in human acts?

Objections

Objection 1 : It would seem that there is nothing voluntary in human acts. For that is voluntary "which has its principle within itself." as Gregory of Nyssa [*Nemesius, De Natura Hom. xxxii.], Damascene (De Fide Orth. ii, 24), and Aristotle (Ethic. iii, 1) declare. But the principle of human acts is not in man himself, but outside him: since man's appetite is moved to act, by the appetible object which is outside him, and is as a "mover unmoved" (De Anima iii, 10). Therefore there is nothing voluntary in human acts.
Objection 2 : Further, the Philosopher (Phys. viii, 2) proves that in animals no new movement arises that is not preceded by a motion from without. But all human acts are new, since none is eternal. Consequently, the principle of all human acts is from without: and therefore there is nothing voluntary in them.
Objection 3 : Further, he that acts voluntarily, can act of himself. But this is not true of man; for it is written (Jn. 15:5): "Without Me you can do nothing." Therefore there is nothing voluntary in human acts.