Between living and dreaming there is a third thing. Guess it.

All our efforts must tend towards light.

Only a fool thinks price and value are the same.

Man's passion for truth is such that he will welcome the bitterest of all postulates so long as it strikes him as true.

Life is the path you beat while you walk it It's the walking that beats the path It is not the path that makes the walk

All uncertainty is fruitfull ... so long as it is accompanied by the wish to understand

The great philosophers are poets who believe in the reality of their poems.