I cannot but think that he who finds a certain proportion of pain and evil inseparably woven up in the life of the very worms, will bear his own share with more courage and submission.

It is the first duty of a hypothesis to be intelligible.

If there is anything in the world which I do firmly believe in, it is the universal validity of the law of causation.

Science reckons many prophets, but there is not even a promise of a Messiah.

If every man possessed everything he wanted, and no one had the power to interfere with such possession; or if no man desired thatwhich could damage his fellow-man, justice would have no part to play in the universe.

The only question which any wise man can ask himself, and which any honest man will ask himself, is whether a doctrine is true or false.

People may talk about intellectual teaching, but what we principally want is the moral teaching.