"The tragic and the comic are the same, insofar as both are contradiction; but the tragic is the suffering contradiction, the comical the painless contradiction."

"If I am to love God, I must be able to recognize him; if I am to recognize him, then he must be visible; if he is visible, then he is not God."

"The most tremendous energy of which the world is capable is the spiritual energy of a man who is in despair."

"The religious individual is the one who lives in fear and trembling before God."

"To be a human being is to be in a state of eternal becoming, and that is why no one can capture himself in a definition."