"The only real prison is fear, and the only real freedom is freedom from fear."
唯一真正的监狱是恐惧，唯一真正的自由是从恐惧中解脱。
The secret of being miserable is to have leisure to bother about whether you are happy or not.
我们不是地球的所有者，我们只是它的乘客。
You have to fight through some bad days to earn the best days of your life.
The soul is placed in the body like a rough diamond, and must be polished, or the luster of it will never appear.
定理是永恒的；它们的证明是短暂的。
理论物理学实际上是哲学。