I am not interested in constructing a building, so much as in having a perspicuous view of the foundations of possible buildings.

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.

A man's thinking goes on within his consciousness in a seclusion in comparison with which any physical seclusion is an exhibition to public view.

Genius is talent exercised with courage.

Telling someone something he does not understand is pointless, even if you add that he will not be able to understand it.

Only a man who lives not in time but in the present is happy.

A serious and good philosophical work could be written consisting entirely of jokes.