"Knowledge is in the end based on acknowledgement."

"My fundamental conception is that the 'logical constants' are not representatives; that there can be no representatives of the logic of facts."

"Nothing is so difficult as not deceiving oneself."

"What is good is also divine. Queer as it sounds, that sums up my ethics. Only something supernatural can express the Supernatural."

"How can it be that philosophy, being a matter of thinking, is so arduous?"