Avoid taking oaths, if possible, altogether; at any rate, so far as you are able.
Avoid public and vulgar entertainments; but if ever an occasion calls you to them, keep your attention upon the stretch, that you may not imperceptibly slide into vulgarity. For be assured that if a person be ever so pure himself, yet, if his companion be corrupted, he who converses with him will be corrupted likewise.
Provide things relating to the body no further than absolute need requires, as meat, drink, clothing, house, retinue. But cut off everything that looks toward show and luxury.
Before marriage guard yourself with all your ability from unlawful intercourse with women; yet be not uncharitable or severe to those who are led into this, nor boast frequently that you yourself do otherwise.