“Learning carries within itself certain dangers because out of necessity one has to learn from one's enemies.”

“Life is not an easy matter... You cannot live through it without falling into frustration and cynicism unless you have before you a great idea which raises you above personal misery, above weakness, above all kinds of perfidy and baseness.”

“Old age is the most unexpected of all things that happen to a man.”

“The depth and strength of a human character are defined by its moral reserves. People reveal themselves completely only when they are thrown out of the customary conditions of their life, for only then do they have to fall back on their reserves.”

“The historic ascent of humanity, taken as a whole, may be summarized as a succession of victories of consciousness over blind forces - in nature, in society, in man himself.”

“There are no absolute rules of conduct, either in peace or war. Everything depends on circumstances.”

“Not believing in force is the same as not believing in gravitation.”

“City of prose and fantasy, of capitalist automation, its streets a triumph of cubism, its moral philosophy that of the dollar. New York impressed me tremendously because, more than any other city, it is the fullest expression of our modern age.”

“‎The party that leans upon the workers but serves the bourgeoisie, in the period of the greatest sharpening of the class struggle, cannot but sense the smells wafted from the waiting grave.”

“In a country where the sole employer is the State, opposition means death by slow starvation. The old principle: who does not work shall not eat, has been replaced by a new one: who does not obey shall not eat.”

“Old age is the most unexpected of all the things that can happen to a man.”