To be brave is to love someone unconditionally, without expecting anything in return.

The present is always changing, but the past is fixed.

The deepest theorems often arise from the simplest observations.

宇宙是一个巨大的、相互连接的信息网络，而量子力学是解锁其秘密的关键。

The future is not a result of choices among alternative paths offered by the present, but a place that is created—created first in the mind and will, created next in activity.

个人的即是政治的。