Let your conversation be without malice or envy, for it is a sign of a tractable and commendable nature; and in all cases of passion admit reason to govern.
Be not immodest in urging your friend to discover a secret.
Utter not base and frivolous things amongst grown and learned men, nor very difficult questions or subjects amongst the ignorant, nor things hard to be believed.
Speak not of doleful things in time of mirth nor at the table; speak not of melancholy things, as death and wounds; and if others mention them, change, if you can, the discourse. Tell not your dreams but to your intimate friends.
Break not a jest when none take pleasure in mirth. Laugh not aloud, nor at all without occasion. Deride no man's misfortunes, though there seem to be some cause.
Speak not injurious words, neither in jest nor earnest. Scoff at none, although they give occasion.
Be not forward, but friendly and courteous, the first to salute, hear and answer, and be not pensive when it is time to converse.
Detract not from others, but neither be excessive in commending.
Go not thither where you know not whether you shall be welcome or not. Give not advice without being asked; and when desired, do it briefly.
If two contend together, take not the part of either unconstrained, and be not obstinate in your opinions; in things indifferent be of the major side.