Definitions: (1) to do exactly what is required under the circumstances; (2) especially suitable or relevant to a situation; (3) fit or proper; compatible <particularly with relationships>
Synonyms: adapted, apt, becoming, congruous, , pertinent, particular
Quote: I shall now recall to mind that the motion of the heavenly bodies is circular, since the motion appropriate to a sphere is rotation in a circle. — Nicolaus Copernicus (1473–1543) Polish Renaissance polymath [eight disciplines]
Comment: “To do exactly what is required under the circumstances” may be something very bizarre if you’re a prisoner in a concentration camp, a kid in the ghetto, or even a housewife in the suburbs. But as long as you are sincere and conscious of doing the best thing, then you are making a choice, and you are acting in your right mind.