A stoic quote by Marcus Aurelius from Meditations, XII.17

If it is not right, do not do it: if it is not true, do not say it. For let your impulse be in your own power.
― Marcus Aurelius Meditations, XII.17

Stoic Sage in Training

A Sage is a theoretical perfect stoic - I can only attempt to act as I imagine he would act in my situation.