Science is not perfect. It's often misused; it's only a tool, but it's the best tool we have. Self-correcting , ever changing, applicable to everything: with this tool, we vanquish the impossible.

The method of science, as stodgy and grumpy as it may seem, is far more important than the findings of science.

It means nothing to be open to a proposition we don't understand.

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

It seems madness to say, 'We're worried that they're going to become addicted to marijuana' -- there's no evidence whatever that it's an addictive drug, but even if it were, these people are dying, what are we saving them from?

The visions we offer our children shape the future.

An organism at war with itself is doomed.