Soon ripe, soon rotten. 熟得快，烂得快。

Soon learn, soon forgotten. 学得快，忘得快。

Something is better than nothing. 聊胜于无。

Short accounts make long friends. 好朋友勤算账。

Set a thief to catch a thief. 以贼捉贼。

Send a wise man on an errand, and say nothing to him. 智者当差，不用交代。

Seek the truth from facts. 实事求是。

Seeing is believing. 眼见为实。

Saying is one thing and doing another. 言行不一。

Rome is not built in a day. 冰冻三尺，非一日之寒。