Science and literature are not two things, but two sides of one thing.

Agnosticism is not properly described as a "negative" creed, nor indeed as a creed of any kind, except in so far as it expresses absolute faith in the validity of a principle which is as much ethical as intellectual.

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

I would rather be the offspring of two apes than be a man and afraid to face the truth.

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

In matters of the intellect, do not pretend that conclusions are certain which are not demonstrated or demonstrable. That I take to be the agnostic faith, which if a man keep whole and undefiled, he shall not be ashamed to look the universe in the face, whatever the future may have in store for him.

If individuality has no play, society does not advance; if individuality breaks out of all bounds, society perishes.