It is lost labour to sow where there is no soil.没有土壤，播种也是徒劳。

 

It is not work that kills， but worry.工作不会伤身，伤身乃是忧虑。

 

It is right to put everything in its proper use.凡事都应用得其所。

 

Knowledge advances by steps and not by leaps.知识只能循序渐进，不能跃进。