Got reason? Use it.

The source

"Got reason? Use it." Marcus Aurelius said it in Meditations 4.13. Translated by George Long, 1862.

"Hast thou reason? I have. Why then dost not thou use it?"

George Long, 1862, Meditations 4.13.

Who said it

Marcus Aurelius (121–180 AD). Roman emperor who wrote private notes to himself on a military campaign. We know them as the Meditations.

Questions

Who said "Got reason? Use it."?

Marcus Aurelius (121–180 AD). Source: Meditations 4.13.

What is the original wording?

Hast thou reason? I have. Why then dost not thou use it? (George Long, 1862). Translated by George Long, 1862.