Men talk only to conceal the mind. (Strauss 1994, p. 1088)Mind your own business. (Strauss, 1998 p. 719)Mind your P's and Q's. or British: Mind your manners
The magistrates of the realm … draw 30,000 Ps. from the magistracy and become rich, doing harm to the poor Indians and the chiefs, despising and taking away their jobs and positions in this realm.… From this there is no defense by the principal chiefs, because they act with him and are partners. They are praised by the priest, the magistrate: "Oh, what a good principal chief, don Pedro!"… The said magistrates … and other Spaniards who walk among the Indians are as absolute rulers with little fear of God and justice.
You have to mind your Ps and Qs a little bit.
Jack Black