saying is one thing and doing another.
1、言行不一。
seeing is believing.
2、眼见为实。
seek the truth from facts.
3、实事求是。
send a wise man on an errand, and say nothing to him.
4、智者当差，不用交代。
set a thief to catch a thief.
5、以贼捉贼。
short accounts make long friends.
6、好朋友勤算账。
something is better than nothing.
7、聊胜于无。
soon learn, soon forgotten.
8、学得快，忘得快。
soon ripe, soon rotten.
9、熟得快，烂得快。
speech is silver, silence is gold.
10、能言是银，沉默是金。