It is not good to try to stop knowledge from going forward. Ignorance is never better than knowledge.

When asked what he meant by a miracle: Oh, anything with a probability of less than 20%.

[on what characteristics Nobel prize winning physicists had in common] I cannot think of a single one, not even intelligence.

Never underestimate the joy people derive from hearing something they already know.

Where is everybody? Humans could theoretically colonize the galaxy in a million years or so, and if they could, astronauts from older civilizations could do the same. So why haven't they come to Earth?

One might be led to question whether the scientists acted wisely in presenting the statesmen of the world with this appalling problem. Actually there was no choice. Once basic knowledge is acquired, any attempt at preventing its fruition would be as futile as hoping to stop the earth from revolving around the sun.

Before I came here I was confused about this subject. Having listened to your lecture I am still confused. But on a higher level.