有人居住的世界的界限是由人类知识的范围决定的。
没有“悲哀”提供平衡，“愉快”一词就会失去意义。
The greatest obstacle to progress is not ignorance, but the illusion of knowledge.
Sometimes, the things we can't change end up changing us.
The theory of computation provides a foundation for understanding what can and cannot be computed.
The quality of your life is determined by the quality of your relationships.
"I am the best me there is. I think I’m pretty cool."