saying is one thing and doing another. 言行不一。
seeing is believing.眼见为实。
seek the truth from facts. 实事求是。
send a wise man on an errand, and say nothing to him.智者当差，不用交代。
set a thief to catch a thief. 以贼捉贼。
short accounts make long friends. 好朋友勤算账。
something is better than nothing. 聊胜于无。
soon learn, soon forgotten. 学得快，忘得快。
soon ripe, soon rotten. 熟得快，烂得快。
speech is silver, silence is gold. 能言是银，沉默是金。
still water run deep. 静水常深。
strike the iron while it is hot. 趁热打铁。
success belongs to the persevering. 坚持就是胜利。