65.1-2
1. I shared my time yesterday with ill health; it claimed for itself all the period before noon; in the afternoon, however, it yielded to me. And so I first tested my spirit by reading; then, when reading was found to be possible, I dared to make more demands upon the spirit, or perhaps I should say, to make more concessions to it. I wrote a little, and indeed with more concentration than usual, for I am struggling with a difficult subject and do not wish to be downed. In the midst of this, some friends visited me, with the purpose of employing force and of restraining me, as if I were a sick man indulging in some excess. 2. So conversation was substituted for writing; and from this conversation I shall communicate to you the topic which is still the subject of debate; for we have appointed you referee. You have more of a task on your hands than you suppose, for the argument is threefold. Our Stoic philosophers, as you know, declare that there are two things in the universe which are the source of everything,—namely, cause and matter. Matter lies sluggish, a substance ready for any use, but sure to remain unemployed if no one sets it in motion. Cause, however, by which we mean reason, moulds matter and turns it in whatever direction it will, producing thereby various concrete results. Accordingly, there must be, in the case of each thing, that from which it is made, and, next, an agent by which it is made. The former is its material, the latter its cause.