I am grateful that I am not as judgmental as all those censorious, self-righteous people around me. In each of us there is a little of all of us.

To be content with life or to live merrily, rather all that is required is that we bestow on all things only a fleeting, superficial glance; the more thoughtful we become the more earnest we grow.

Nothing puts a greater obstacle in the way of the progress of knowledge than thinking that one knows what one does not yet know.

Some theories are good for nothing except to be argued about.

A person reveals his character by nothing so clearly as the joke he resents.

A book which, above all others in the world, should be forbidden, is a catalogue of forbidden books.

Reason now gazes above the realm of the dark but warm feelings as the Alpine peaks do above the clouds. They behold the sun more clearly and distinctly, but they are cold and unfruitful.