只要生者还在记忆，逝者就从未真正离去。

人类的思想是如此复杂，事物之间是如此纠缠，以至于要解释一片草叶，就必须绘制宇宙的图表。

世界拥有技术 - 无论是现有的还是研究中的 - 可以在可持续的基础上养活100亿人口。

I have to remind myself that some birds aren't meant to be caged. Their feathers are just too bright. And when they fly away, the part of you that knows it was a sin to lock hem up DOES rejoice. Still, the place you live in is that much more drab and empty that they're gone. I guess I just miss my friend.

在量子力学中，轨迹的概念失去了意义。