The assignment of purpose to everything is called teleology. Children are native teleologists, and many never grow out of it.

We have to find our own purposes in life, which are not derived directly from our scientific history.

If you want to do evil, science provides the most powerful weapons to do evil; but equally, if you want to do good, science puts into your hands the most powerful tools to do so

If you're an atheist, you know, you believe, this is the only life you're going to get. It's a precious life. It's a beautiful life. Its something we should live to the full, to the end of our days. Where if you're religious and you believe in another life somehow, that means you don't live this life to the full because you think you're going to get another one. That's an awfully negative way to live a life. Being a atheist frees you up to live this life properly, happily and fully

Science has taught us, against all intuition, that apparently solid things like crystals and rocks are really almost entirely composed of empty space. And the familiar illustration is the nucleus of an atom is a fly in the middle of a sports stadium, and the next atom is in the next sports stadium.

There's real poetry in the real world. Science is the poetry of reality.

We have sexual lust even though we know perfectly well that, because we're using contraception, it is not going to result in the propagation of our genes. That doesn't matter, because the lust was built into our brains at a time when there was no contraception.