Bring up a raven and he'll pick out your eyes.

　　养虎贻患。

　　Burn not your house to rid it of the mouse.

　　投鼠忌器。

　　Burnt child dreads the fire.

　　一朝被蛇咬，十年怕井绳。

　　Business before pleasure.

　　事业在先，享乐在后。

　　Business is business.

　　公事公办。

　　By doing we learn.

　　经一事，长一智。

　　By falling we learn to go safely.

　　吃一堑，长一智。

　　By other's faults, wise men correct their own.

　　他山之石，可以攻玉。

　　By reading we enrich the mind; by conversation we polish it.

　　读书可以使我门的思想充实，谈话使其更臻完美。

　　pain past is pleasure

　　过去的痛苦即快乐。

　　All things are difficult before they are easy.

　　凡事必先难后易。

　　Nothing is impossible to a willing heart.

　　心之所愿，无事不成。