rains but it pours

Jack of all trades and master of none.
门门粗通，样样稠松。

It never rains but it pours.
不叫则未，一举成名。

It takes three generations to make a gentleman.
十年树木，百年树我。

If you venture nothing, you will have nothing.
不进虎穴，焉得虎子。

It is easier to get money than to keep it.
挣钱轻易攒钱难。

Justice has long arms.
地网恢恢，疏而不漏。

If you want knowledge, you must toil for it.
要想供知，就得刻苦。

Judge not from appearances.
己不可貌相，海不可斗质。

It is better to die when life is a disgrace.
宁为玉碎，不替瓦齐。

Industry is the parent of success.
勤恳是胜利之母。