To complain that man measures God by his own experience is a waste of time; man measures everything by his own experience; he has no other yardstick.

Passion's a good, stupid horse that will pull the plough six days a week if you give him the run of his heels on Sundays. But love's a nervous, awkward, over-mastering brute; if you can't rein him, it's best to have no truck with him.

Man is never truly himself except when he is actively creating something.

The only ethical principle which has made science possible is that the truth shall be told all the time. If we do not penalize false statements made in error, we open up the way for false statements by intention. And a false statement of fact, made deliberately, is the most serious crime a scientist can commit.

Those who make some other person their job... are dangerous.

It was left for the present age to endow Covetousness with glamour on a big scale, and to give it a title which it could carry like a flag. It occurred to somebody to call it Enterprise. From the moment of that happy inspiration, Covetousness has gone forward and never looked back.

God was executed by people painfully like us, in a society very similar to our own ... by a corrupt church, a timid politician, and a fickle proletariat led by professional agitators.