False flattery is the poison of friendship, and sincere criticism is the gift of friendship.
False modesty can only win vulgar applause, but can not make real progress. -Hua
Hypocrites are despised by wise men, admired by fools, worshipped by flatterers and enslaved by their own vanity. bacon
A false heart will not have strong legs. -Shakespeare
Hypocrisy means falsehood and unreality. There is also a false meaning, which is often used to evaluate personal behavior in modern society.