BE willing to approve yourself to yourself. Be willing to appear beautiful in the sight of God: be desirous to converse in purity with your own pure mind, and with God; and then, if any such appearance strikes you, Plato directs you: "Have recourse to expiations: go a suppliant to the temples of the averting deities." It is sufficient, however, if you propose to yourself the example of wise and good men, whether alive or dead; and compare your conduct with theirs.
EPICTETUS. DISCOURSES. Book ii. §18. ¶4