在量子世界中,观察某物会改变它。这不是我们技术的限制,而是自然界的基本属性。
悲观主义者是这种人:当他可以从两种罪恶中选择时,他把两种都选了。
The only real prison is fear, and the only real freedom is freedom from fear.
The highest possible stage in moral culture is when we recognize that we ought to control our thoughts.  
痛苦是一种语言,只有经历过的人才能理解。