人类需要悲伤，正如需要欢乐一样。

Language is the house of being. In its home man dwells. Those who think and those who create with words are the guardians of this home.

Home is not where you are born; home is where all your attempts to escape cease.

The universe is a pretty big place. If it's just us, seems like an awful waste of space.

激励措施的微小变化可以导致行为的巨大变化。