Few people can be happy unless they hate some other person, nation, or creed.

Very few men can be genuinely happy in a life involving continual self-assertion against the skepticism of the mass of mankind, unless they can shut themselves up in a coterie and forget the cold outer world. The man of science has no need of a coterie, since he is thought well of by everybody except his colleagues. The artist, on the contrary, is in the painful situation of having to choose between being despised and being despicable.

Fools and fanatics are always so certain of themselves.

My whole religion is this: do every duty, and expect no reward for it, either here or hereafter.

The qualities most needed are charity and tolerance, not some form of fanatical faith such as is offered to us by the various rampant isms

If an opinion contrary to your own makes you angry, that is a sign that you are subconsciously aware of having no good reason for thinking as you do.

Patriotism is the willingness to kill and be killed for trivial reasons.