Science doesn't purvey absolute truth. Science is a mechanism... for testing your thoughts against the universe.

If you have talent, you will receive some measure of success - but only if you persist.

Boasts are wind and deeds are hard.

Do not forget that a traitor within our ranks, known to us, can do more harm to the enemy than a loyal man can do good to us.

All normal life, Peter, consciously or otherwise, resent domination. If the domination is by an inferior, or by a supposed inferior, the resentment becomes stronger.

If I am right, then (religious fundamentalists) will not go to Heaven, because there is no Heaven. If they are right, then they will not go to Heaven, because they are hypocrites.

The true artist is quite rational as well as imaginative and knows what he is doing; if he does not, his art suffers.