To create a healthy philosophy you should renounce metaphysics but be a good mathematician.

No nation was ever so virtuous as each believes itself, and none was ever so wicked as each believes the other.

A stupid man's report of what a clever man says can never be accurate, because he unconsciously translates what he hears into something he can understand.

Philosophy is that part of science which at present people chose to have opinions about, but which they have no knowledge about. Therefore every advance in knowledge robs philosophy of some problems which formerly it had ...and will belong to science.

Insight, untested and unsupported, is an uncertain guarantee of the truth.

Public opinion is always more tyrannical towards those who obviously fear it than towards those who feel indifferent to it.

Love cannot exists as a duty; to tell a child that it ought to love its parents and its brother and sisters is utterly useless, if not worse.