Thanks to the discoveries of astronomers in the twentieth century, we now know that the heat death is a myth. The heat death can never happen, and there is no paradox.

We should try to introduce our children to science today as a rebellion against poverty and ugliness and militarism and economic injustice.

Most of what we see in the universe is dust.

Sometimes we talked about the nature of the human soul and about the Cosmic Unity of souls that I had believed in so firmly when I was 15 years old. My mother did not like the phrase Cosmic Unity. It was too pretentious. She preferred to call it a world soul.

In the end it is how you fight, as much as why you fight, that makes your cause good or bad.

All the time worrying about pushing the children and getting them to be mathematically literate and all that stuff. It's terribly hard on the kids. It's also hard on the teachers. And I think it's totally useless.

That's the beautiful thing about science - that it's all about things we don't understand, not just the things we do understand.