"‘There are as many opinions as there are men’: expressing the fact that there is considerable diversity of opinion, and the difficulty of bringing about agreement", Mid 16th cent.; earliest use found in Richard Taverner (?1505–1575), translator and evangelical reformer. From classical Latin quot hominēs tot sententiae there are as many opinions as there are men from quot how many + hominēs, plural of homō man + tot so many + sententiae, plural of sententia.[quot homines tot sententiae etymology, quot homines tot sententiae origin, 英语词源]