The Instructor 3.11.80

They say that the wife of Aeneas, through excess of modesty, did not uncover herself even when Troy was being taken, though terrified, but, fleeing from the burning, remained veiled. Those who are being initiated into Christ ought to appear and to shape themselves throughout their whole life such as they present themselves in the churches, in the more dignified manner; and to be, not to seem to be, such: so gentle, so reverent, so loving. But now, I do not know how, they change their fashions and manners with the places, just as they say polyps, becoming like the rocks they cling to, take on their color too. At any rate, laying aside the inspiration of the assembly after leaving it, they become like the many with whom they live; or rather, laying aside the feigned pretense of dignity, they are exposed as what they secretly were. Having revered the word about God, they have left behind inside what they heard, and outside they wander about with the godless, filling themselves with the strumming and trilling of love songs, flute-playing, clapping, drunkenness, and every kind of rubbish. They sing and answer in song, these very people who earlier were hymning immortality, and at the end, wicked men wickedly singing the most ruinous recantation: