It is scientific only to say what is more likely and what less likely, and not to be proving all the time the possible and impossible.

The problem of creating something new, but which is consistent with everything which has been seen before, is one of extreme difficulty.

I, a universe of atoms, an atom in the universe.

There is no harm in doubt and skepticism, for it is through these that new discoveries are made.

Fall in love with some activity, and do it! Nobody ever figures out what life is all about, and it doesn't matter.

I'd hate to die twice. It's so boring.

Although it is uncertain, it is necessary to make science useful. Science is only useful if it tells you about some experiment that has not been done; it is not good if it only tells you what just went on.