最好的投资是那些将要改变世界的人。
The only way to change behavior is through manipulation of reinforcement contingencies.
If a listener nods his head when you're explaining your program, wake him up.
自己吃饱了应当想到别人的饥饿，身上穿暖了应当想到别人的寒冷，享受安逸应当想到百姓的劳累。
To live is to embrace the contradictions of life.
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."