You and I will agree, I think, that outward things are sought for the satisfaction of the body, that the body is cherished out of regard for the soul, and that in the soul there are certain parts which minister to us, enabling us to move and to sustain life, bestowed upon us just for the sake of the primary part of us. In this primary part there is something irrational, and something rational. The former obeys the latter, while the latter is the only thing that is not referred back to another, but rather refers all things to itself. For the divine reason also is set in supreme command over all things, and is itself subject to none; and even this reason which we possess is the same, because it is derived from the divine reason. 2. Now if we are agreed on this point, it is natural that we shall be agreed on the following also - namely, that the happy life depends upon this and this alone: our attainment of perfect reason. For it is naught but this that keeps the soul from being bowed down, that stands its ground against Fortune; whatever the condition of their affairs may be, it keeps men untroubled. And that alone is a good which is never subject to impairment. That man, I declare, is happy whom nothing makes less strong than he is; he keeps to the heights, leaning upon none but himself; for one who sustains himself by any prop may fall. If the case is otherwise, then things which do not pertain to us will begin to have great influence over us. But who desires Fortune to have the upper hand, or what sensible man prides himself upon that which is not his own?