When you do anything from a clear judgment that it ought to be done, never shun the being seen to do it, even though the world should make a wrong supposition about it
 Epictetus, Enchiridion (125). copy citation

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Author Epictetus
Source Enchiridion
Topic judgment wrong
Date 125
Language English
Reference
Note Translated by Elizabeth Carter
Weblink http://classics.mit.edu/Epictetus/epicench.html

Context

“And even though it should appear to you a seasonable gratification, take heed that its enticing, and agreeable and attractive force may not subdue you; but set in opposition to this how much better it is to be conscious of having gained so great a victory. 35. When you do anything from a clear judgment that it ought to be done, never shun the being seen to do it, even though the world should make a wrong supposition about it; for, if you don't act right, shun the action itself; but, if you do, why are you afraid of those who censure you wrongly? 36. As the proposition, "Either it is day or it is night," is extremely proper for a disjunctive argument, but quite improper in a conjunctive one, so, at a feast, to choose the largest share is very suitable to the bodily appetite, but utterly inconsistent with the social spirit of an entertainment.” source