The fundamental point in fabricating a chain reacting machine is of course to see to it that each fission produces a certain number of neutrons and some of these neutrons will again produce fission.

Never underestimate the power of persistence. Most people give up too soon.

记忆就是对抗消失的斗争。

我一直是个注重隐私的人，但我明白这是不可避免的。