N. maxim, aphorism, apothegm, apophthegm, # dictum, saying, adage, saw, proverb, sentence, mot, motto, word, byword, moral, phylactery, protasis, axiom, theorem, scholium, truism, postulate, first principles, a priori fact, assumption (supposition) 514, reflection, conclusion, golden rule, principle, principia, profession of faith, settled principle, accepted principle, formula, accepted fact, received truth, wise maxim, sage maxim, received maxim, admitted maxim, recognized maxim &c, true saying, common saying, hackneyed saying, trite saying, commonplace saying &c

Adj. aphoristic, proverbial, phylacteric, axiomatic, gnomic

Adv. as the saying goes, as the saying is, as they say