wise man have their mouths in their hearts, fools have their hearts in their mouths.

1、智者嘴在心里，愚者心在嘴里。

work makes the workman.

2、勤工出巧匠。

you cannot burn the candle at both ends.

3、蜡烛不能两头点，精力不可过分耗。四级考试试题

you cannot eat your cake and have it.

4、鱼与熊掌，不可得兼。

you can take a horse to the water but you cannot make him drink.

5、强扭的瓜不甜。

you may know by a handful the whole sack.

6、由一斑可知全貌。

you never know what you can till you try.

7、是驴子是马，拉出来遛遛。

to know everything is to know nothing.

8、什么都知道，一如什么都不知道。

to know oneself is true progress.

9、人贵有自知之明。

tomorrow never comes.

10、我生待明日，万事成蹉跎。