But when the soul contains some of those false opinions which are the principal cause of vice, must we not acknowledge that something positive occurs in her, and that one of her parts undergoes an alteration? Is not the disposition of the soul's irascible part different according to its courage or cowardliness? And the soul's appetitive-part, according to whether it be temperate or intemperate? We answer that a part of the soul is virtuous, when it acts in conformity with its "being," or when it obeys reason; for reason commands all the parts of the soul, and herself is subjected to intelligence. Now to obey reason is to see; it is not to receive an impression, but to have an intuition, to carry out the act of vision.[33] Sight is of the same (nature) when in potentiality, or in actualization; it is not altered in passing from potentiality to actualization,[34] she only applies herself to do what it is her (nature) to do, to see and know, without being affected. Her rational part is in the same relation with intelligence; she has the intuition thereof.[35] The nature of intelligence is not to receive an impression similar to that made by a seal, but in one sense to possess what it sees, and not to possess it in another; intelligence possesses it by cognizing it; but intelligence does not possess it in this sense that while seeing it intelligence does not receive from it a shape similar to that impressed on wax by a seal. Again, we must not forget that memory does not consist in keeping impressions, but is the soul's faculty of recalling and representing to herself the things that are not present to her. Some objector might say that the soul is different before reawakening a memory, and after having reawakened it. She may indeed be different, but she is not altered, unless indeed, we call the passing from potentiality to actualization an alteration. In any case, nothing extraneous enters into her, she only acts according to her own nature. ONLY THE PHYSICAL ORGANS, NOT THE IMMATERIAL NATURES, COULD BE AFFECTED. In general, the actualizations of immaterial (natures) do not in any way imply that these (natures) were altered--which would imply their destruction--but, on the contrary, they remain what they were. Only material things are affected, while active. If an immaterial principle were exposed to undergo affections, it would no longer remain what it is. Thus in the act of vision, the sight acts, but it is the eye that is affected. As to opinions, they are actualizations analogous to sight. PSYCHOLOGICAL EXPLANATION OF ANGER-PART'S COURAGE OR COWARDLINESS.