Humanities deepest desire for knowledge is justification enough for continuing our quest. and our goal is nothing less than a complete description of the universe we live in.

One, remember to look up at the stars and not down at your feet. Two, never give up work. Work gives you meaning and purpose and life is empty without it. Three, if you are lucky enough to find love, remember it is there and don't throw it away.

I think [contacting an alien civilization] would be a disaster. The extraterrestrials would probably be far in advance of us. The history of advanced races meeting more primitive people on this planet is not very happy, and they were the same species. I think we should keep our heads low.

What I have learned from life is to make the most of what you have got.

We waste time, so you don't have to.

The universe is governed by science. But science tells us that we can't solve the equations, directly in the abstract.

I am discounting the reports of UFOs. Why would they appear only to cranks and weirdos?