Meditations 8.13

Constantly, and, if it be possible, on the occasion of every impression on the soul, apply to it the principles of Physic, of Ethic, and of Dialectic.

Marcus Aurelius, Meditations 8.13, translated by George Long

Persistently and, if possible, in every case test thy impressions by the rules of physics, ethics, logic.

Marcus Aurelius, Meditations 8.13, translated by C. R. Haines