A main cause of philosophical disease-an unbalanced diet: one nourishes one's thinking with only one kind of example.

If we were to imagine an orange on the blue side or green on the red side or violet on the yellow side, it would give us the same impression as a north wind coming from the southwest.

In order to be able to set a limit to thought, we should have to find both sides of the limit thinkable (i.e. we should have to be able to think what cannot be thought).

The world is the totality of facts, not of things

What is troubling us is the tendency to believe that the mind is like a little man within.

The popular scientific books by our scientists aren't the outcome of hard work, but are written when they are resting on their laurels.

Because our goals are not lofty but illusory, our problems are not difficult, but nonsensical.