I attribute the little I know to my not having been ashamed to ask for information, and to my rule of conversing with all descriptions of men on those topics that form their own peculiar professions and pursuits.
Conversation should be pleasant without scurrility, witty without affectation, free without indecency, learned without conceitedness, novel without falsehood.
Never hold anyone by the button or the hand in order to be heard out; for if people are unwilling to hear you, you had better hold your tongue than them.