Idioms: the American heritage
Idioms, especially if we add proverbs and familiar quotations to them, are a shoreless ocean. Especially numerous are so-called gnomic sayings (aphorisms) like make hay while the sun shines, better safe than sorry, and a friend in need is a friend indeed. Their age is usually hard or even impossible to determine. Since most of them reflect people’s universal experience, they may be very old.