Book IV · 13
Hast thou reason? I have.—Why then dost not thou use it? For if this does its own work, what else dost thou wish?
Hast thou reason? I have. Why then not use it? For if this performs its part, what else wouldest thou have?
Marcus Aurelius, Meditations IV.13. Translated by George Long (1862). The Stoic Library.