Psychology must be based on observable phenomena, not abstractions.

The problem is not that we laugh too much， but that we laugh about everything.

If we had paid no more attention to our plants than we have to our children, we would now be living in a jungle of weeds.

忙于追求天理的人，对人的欲望必定淡薄。忙于私事的人，处理公务必然粗心，追求虚饰外表的人，内在之心必定单薄。

The greater the obstacle， the more glory in overcoming it.