“It is very important for young people keep their sense of wonder and keep asking why.”

The thing about smart people is that they seem like crazy people to dumb people.

If aliens visit us, the outcome would be much as when Columbus landed in America, which didn’t turn out well for the Native Americans.

Keeping an active mind has been vital to my survival, as has been maintaining a sense of humor.

We don’t let animals suffer, so why humans?

The more you learn, the more you know. The more you know, the more you forget. The more you forget, the less you know. So why bother to learn.

Love the neighbour. But don’t get caught.

Nothing is better than reading and gaining more and more knowledge.

I think the human race doesn’t have a future if we don’t go into space. We need to expand our horizons beyond planet Earth if we are to have a long-term future.

I’m not afraid of death, but I’m in no hurry to die.

I’d say I don’t believe in God, but I’m afraid He might hear me.

There is a fundamental difference between religion, which is based on authority, and science, which is based on observation and reason. Science will win because it works.

There is no prescribed route to follow to arrive at a new idea. You have to make the intuitive leap.

Time travel may be possible, but it is not practical.

Science is not only a disciple of reason but, also, one of romance and passion.

It matters if you just don’t give up.

We are all now connected by the Internet, like neurons in a giant brain.