ing the Soul itself. It was stated before, you will remember, that the Soul consists of two parts, the Rational, and Irrational: we must now make a similar division of the Rational.
Let it be understood then that there are two parts of the Soul possessed of Reason; one whereby we realise those existences whose causes cannot be otherwise than they are, and one whereby we realise those which can be otherwise than they are[1] (for there must be, answering to things generically different, generically different parts of the soul naturally adapted to each, since these parts of the soul possess their knowledge in virtue of a certain resemblance and appropriateness in themselves to the objects of which they are percipients);[2] and let us name the former, “that which is apt to know,” the latter, “that which is apt to calculate” (because deliberating and calculating are the same, and no one ever deliberates about things which cannot be otherwise than they are: and so the Calculative will be one part of the Rational faculty of the soul).
We must discover, then, which is the best state of each of these, because that will be the Excellence of each; and this again is relative to the work each has to do.[3]
II
There are in the Soul three functions on which depend moral action and truth; Sense, Intellect, Appetition, whether vague Desire or definite Will. Now of these Sense is the originating cause of no moral action, as is seen from the fact that brutes have Sense but are in no way partakers of moral action.
[Intellect and Will are thus connected,] what in the Intellectual operation is Affirmation and Negation that in the Will is Pursuit and Avoidance, And so, since Moral Virtue is a State apt to exercise Moral Choice and Moral Choice is Will consequent on deliberation, the Reason must be true and the Will right,[4] to constitute good Moral Choice, and what the Reason affirms the Will must pursue. [5]
Now this Intellectual operation and this Truth is what bears upon Moral Action; of course truth and falsehood