EPICTETUS. DISCOURSES. Book ii. §19. ¶4.
HERE is the artificer; here are the materials; what is it we want? Is not the thing capable of being taught? It is. Is it not in our own power, then? The only thing of all others that is so. Neither riches, nor health, nor fame, nor, in short, anything else, is in our power, except the right use of the appearances of things. This alone is, by nature, not subject to restraint, not subject to hindrance. Why, then, do not you finish it? Tell me the cause. It must be by my fault, or yours, or from the nature of the thing. The thing itself is practicable, and the only one in our power. The fault then must be either in me, or in you, or, more truly, in both. Well, then, shall we now, at last, bring this intention along with us? Let us lay aside all that is past. Let us begin. Only believe me, and you will see the consequence.