People don’t notice whether it’s winter or summer when they’re happy.

The truth is rarely pure and never simple.

出外周游为人算卦的人与坐在家里不出去的人，他们谁得到的粮食多？ 

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

教学应服从于人类心智发展的规律。