The shortest and surest way to live with honour in the world is to be in reality what we would appear to be: and if we observe, we will find that all human virtues increase and strengthen themselves by the practice and experience of them.Socrates (c.470-399 BC) Greek philosopher
In Xenophon, The Memorable Thoughts of Socrates, ch. 6 “Of the Choice of Friends” [tr. Edward Bysshe (1722)]
Alt trans.: "The greatest way to live with honor in this world is to be what we pretend to be."