2. _The Freedom of the Will_. A distinction was taken by Epictetus and other Stoics between things in our power and things not in our power. The things in our power are our opinions and notions about objects, and all our affections, desires, and aversions; the things not in our power are our bodies, wealth, honour, rank, authority, &c., and their opposites. The practical application is this: wealth and high rank may not be in our power, but we have the power to form an _idea_ of these--namely, that they are unimportant, whence the want of them will not grieve us. A still more pointed application is to death, whose force is entirely in the idea.
With this distinction between things in our power and things not in our power, we may connect the arguments between the Stoics and their opponents as to what is now called the Freedom of the Will. But we must first begin by distinguishing the two questions. By things _in our power_, the Stoics meant, things that we could do or acquire, _if we willed_: by things _not in_ our power, they meant, things that we could not do or acquire if we willed. In both cases, the volition was assumed as a fact: the question, what determined it--or whether it was non-determined, _i.e._ self-determining--was not raised in the abovementioned antithesis. But it was raised in other discussions between the Stoic theorist Chrysippus, and various opponents. These opponents denied that volition was determined by motives, and cited the cases of equal conflicting motives (what is known as the ass of Buridan) as proving that the soul includes in itself, and exerts, a special supervenient power of deciding action in one way or the other: a power not determined by any causal antecedent, but self-originating, and belonging to the class of agency that Aristotle recognizes under the denomination of automatic, spontaneous (or essentially irregular and unpredictable). Chrysippus replied by denying not only the reality of this supervenient force said to be inherent in the soul, but also the reality of all that Aristotle called automatic or spontaneous agency generally. Chrysippus said that every movement was determined by antecedent motives; that, in cases of equal conflict, the exact equality did not long continue, because some new but slight motive slipped in unperceived and turned the scale on one side or the other. (See Plutarch De Stoicorum Repugnantiis, c. 23, p. 1045.) Here, we see, the question now known as the Freedom of the Will is discussed: and Chrysippus declares against it, affirming that volition is always determined by motives.