To be without some of the things you want is an indispensable part of happiness.

The best way to predict the future is to invent it.

The past is never dead. It's not even past.

Leadership is about making tough decisions and standing by them, even when they are unpopular.

遗忘比绝望更强有力。

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.

The biggest barrier to change isn't technology; it's the fear of leaving the familiar behind.