If you had to relive your life exactly as it was – same successes and failures, same happiness, same miseries, same mixture of comedy and tragedy – would you want to? Was it worth it?

I knew how many zeroes there were in a quintillion, but I thought that algebra lived in ponds.

The most important thing I learned [...] was that when a person dies he only appears to die. He is still very much alive in the past, so it is very silly for people to cry at his funeral. All moments, past, present and future, always have existed, always will exist.

Even very low-probability events can, and indeed do, occur.

If you had to relive your life exactly as it was – same successes and failures, same happiness, same miseries, same mixture of comedy and tragedy – would you want to? Was it worth it?

In the long history of human affairs, common sense doesn’t have the greatest track record.

Fear distorts the world. Fear sees demons where only shadows dwell.