What is left over if I subtract the fact that my arms goes up from the fact that I raise my arm?

A philosopher always finds more grass to feed upon in the valleys of stupidity than on the arid heights of intelligence.

Man has to awaken to wonder - and so perhaps do peoples. Science is a way of sending him to sleep again.

Never stay up on the barren heights of cleverness, but come down into the green valleys of silliness.

The classifications made by philosophers and psychologists are like trying to classify clouds by their shape.

All propositions are of equal value.

Philosophy hasn't made any progress? - If somebody scratches the spot where he has an itch, do we have to see some progress? Isn't genuine scratching otherwise, or genuine itching itching? And can't this reaction to an irritation continue in the same way for a long time before a cure for the itching is discovered?