You learned the concept 'pain' when you learned language.

It is possible--indeed possible even according to the old conception of logic--to give in advance a description of all 'true' logical propositions. Hence there can never be surprises in logic.

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.

Resting on your laurels is as dangerous as resting when you are walking in the snow. You doze off and die in your sleep.

Everything that can be said, can be said clearly.

This sort of thing has got to be stopped. Bad philosophers are like slum landlords. It's my job to put them out of business.

The real discovery is the one which enables me to stop doing philosophy when I want to. The one that gives philosophy peace, so that it is no longer tormented by questions which bring itself into question.