Better by far to embrace the hard truth than a reassuring fable. If we crave some cosmic purpose, then let us find ourselves a worthy goal.

Our passion for learning ... is our tool for survival.

There is in this Universe much of what seems to be design.

We are star stuff which has taken its destiny into its own hands. The loom of time and space works the most astonishing transformations of matter.

I think if we ever reach the point where we think we thoroughly understand who we are and where we came from, we will have failed.

There is a reward structure in science that is very interesting: Our highest honors go to those who disprove the findings of the most revered among us. So Einstein is revered not just because he made so many fundamental contributions to science, but because he found an imperfection in the fundamental contribution of Isaac Newton.

we make our world significant by the courage of our questions and the depth of our answers