The test of our progress is not whether we add more to the abundance of those who have much; it is whether we provide enough for those who have too little.

To be a writer is to be a spy on life.

光的原因不在于颜色，而在于光本身。

君子的学习，一定要喜欢提问。提问和学习是相辅相成的。不学习就无法产生疑问，不提问就无法扩展知识。