The mind has transformed the world, and the world is repaying it with interest. It has led man where he had no idea how to go.
History is the science of what never happens twice.
The advantage of the incomprehensible is that it never loses its freshness.
Serious people have few ideas. People with ideas are never serious.
A man who is 'of sound mind' is one who keeps the inner madman under lock and key.
Nothing is more natural than mutual misunderstanding; the contrary is always surprising. I believe that one never agrees on anything except by mistake, and that all harmony among human beings is the happy fruit of an error.