On Fugitives (133-135)

Let us therefore consider what it is that he who is seeking doubts about, and what he who answers reveals, and in the third place what the thing is which was found. Now what the inquirer asks is something of this kind:—Behold the efficient cause, the fire; behold also the passive part, the material, the wood. Where is the third party, the thing to be effected?

As if he said, —Behold the mind, the fervid and kindled spirit; behold also the objects of intelligence, as it were so much material or fuel; where is the third thing, the act of perceiving? Or, again, —Behold the sight, behold the colour, where is the act of seeing? And, in short, generally, behold the external sense, behold the thing to be judged of; but where are the objects of the external sense, the material, the exertion of the feeling?

To him who puts these questions, answer is very properly made, "God will provide for himself." For the third thing is the peculiar work of God; for it is owing to his providential arrangement that the mind comprehends, and the sight sees, and that every external sense is exerted. "And a ram is found caught by his horns;" that is to say, reason is found silent and withholding its assent;