"The soul's tragedy lies in the fact that it must destroy what it creates in order to create something new."

"The tragedy of the modern world is that it is too full of meaning and too empty of life."

"The blasé attitude is the subjective reflection of the objective structure of the metropolis."

"He is educated who knows how to find out what he doesn't know."

"The tragedy of the modern individual is that he is too much himself and not enough of the world."