Doubt is clearly a value in science. It is important to doubt and that the doubt is not a fearful thing, but a thing of great value.

It appears that there are enormous differences of opinion as to the probability of a failure with loss of vehicle and of human life. The estimates range from roughly 1 in 100 to 1 in 100,000. The higher figures come from the working engineers, and the very low figures from management.

There is enough energy in a single cubic meter of space to boil all the oceans in the world.

When a Caltech student asked the eminent cosmologist Michael Turner what his "bias" was in favoring one or another particle as a likely candidate to compromise dark matter in the universe, Feynmann snapped, "Why do you want to know his bias? Form your own bias!"

There in wine is found the great generalization: all life is fermentation.

The Quantum Universe has a quotation from me in every chapter - but it's a damn good book anyway.

We decided that 'trivial' means 'proved'. So we joked with the mathematicians: We have a new theorem- that mathematicians can prove only trivial theorems, because every theorem that's proved is trivial.