"The only thing to do with good advice is to pass it on. It is never of any use to oneself."

Emancipate yourselves from mental slavery, none but ourselves can free our minds.

逻辑学研究不仅仅是关于正确推理，更是关于思维的自由。

所以，父母、老师、国君三者，都不能当作做事的法度。 

光线不断变化，每分钟都在改变事物的氛围和美感。