Discourses, "How We Should Struggle Against Appearances" (§4)

“How then shall this be done? Be willing at length to be approved by yourself, be willing to appear beautiful to God, desire to be in purity with your own pure self and with God. Then when any such appearance visits you, Plato says, Have recourse to expiations, go a suppliant to the temples of the averting deities. It is even sufficient if you resort to the society of noble and just men, and compare yourself with them, whether you find one who is living or dead.”