It is not what we know that scares us, it is what we do not

Towns change; they grow or diminish, but hometowns remain as we left them.

You fail all the time, but you aren't a failure until you start blaming someone else.

Respect all. Fear none.

After assembly complete, when we have a larger crew on orbit, a more complex vehicle, more laboratories and more robot arms, maybe we'll have room for specialists. But right now we don't.

The Earth is not dying-it is being killed. And the people who are killing it have names and addresses.

Nothing. And, I don't start before noon.

What gunpowder did for war the printing press has done for the mind.

Nothing worthwhile was ever accomplished without the will to start, the enthusiasm to continue and, regardless of temporary obstacles, the persistence to complete

Because she is too ugly to kiss goodbye.

When it's first and a mile, I won't give it to him.

The whole interest of my reason, whether speculative or practical, is concentrated in the three following questions: What can I know? What should I do? What may I hope? (Critique of Pure Reason

That man's silence is wonderful to listen to.

Given the scale of issues like global warming and epidemic disease, we shouldn't underestimate the importance of a can-do attitude to science rather than a can't-afford-it attitude.

I tried to start a theatre in LA and failed miserably, but I was probably not meant to raise money.

I found light in the darkness ... or it found me.

Don't move your money from Bear. That's just being silly. Don't be silly.

I was raised in the church.

Open your mind, allow your feelings to be expressed, to be pushed out, and your heart will neither break nor burst, but be a free-flowing channel of the life energy in your soul.

Too late, but I understand. That we don't perish of understanding everything too late, that is a miracle. But we do perish of that -- of just that.

I think I can live without you, but it won't be any kind of life.