宇宙中唯有两件事物是无限的：那就是宇宙的大小与人的愚蠢。而宇宙的大小我却不能肯定。

I have lived with the prospect of an early death for the last 49 years. I'm not afraid of death, but I'm in no hurry to die. I have so much I want to do first.

Your work is going to fill a large part of your life, and the only way to be truly satisfied is to do what you believe is great work.

I write to understand what cannot be understood.

You don't have to be brilliant, only a little bit wiser than the other guys, on average, for a long, long time.

每个人都会承认，我们的思维、情感和想象力产生的观念，都是在心灵中存在的。

我总是感到，生活就象萌发于地下根茎的植株。生活的真正生命是不可见的，它深藏于地下根茎中，而显露出地面的可见一斑部分只能生存一个夏季。我们所见到的是将会消逝的花簇，而根茎长驻。

"We are all made of starstuff, and it's our destiny to explore the stars."

I don’t need a crown to know I’m a king.