1. About Abstractive Knowledge

63. The proof of the first is that when a sufficient active and passive factor are sufficiently close, the effect can follow, and if the agent acts naturally, the effect does follow. But now, when the separated soul has present to it a stone or any object proportioned to it, there come together in the soul an active and a passive factor both sufficient for abstractive knowledge - or for the intelligible species of such object by which abstractive knowledge is had; therefore etc.

64. The proof of the minor is that the agent intellect together with an object is a sufficient active cause of an intelligible species, and no less so when with an external object than with a phantasm (which point they concede); because, as was said in arguing against the opinion [n.52], there is nothing in a phantasm to make it sufficient to cause an intelligible species that does not more eminently belong in the thing of which the phantasm is the phantasm; and the possible intellect is a power sufficiently receptive [of intelligible species].