“One, remember to look up at the stars and not down at your feet. Two, never give up work. Work gives you meaning and purpose and life is empty without it. Three, if you are lucky enough to find love, remember it is there and don’t throw it away.”

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.

One can’t prove that God doesn’t exist. But science makes God unnecessary. The laws of physics can explain the universe without the need for a creator.

I have experimental evidence that time travel is not possible.

Science can explain the universe without the need for a Creator.