"Cellular systems, ecosystems, and civilizations are, at base, thermodynamic systems. ...The system uses energy, eventually releasing it as useless heat. ...there is one vital difference between natural systems and human systems: natural systems receive a fixed energy input that never varies. If we could set a strict limit on energy use, we could build a human system that is just as stable as an ecosystem."

"If sin must be kept alive, then hell must be kept alive; but while I regard the smallest sin as infinitely loathsome, I do not believe that any being, never good enough to see the essential ugliness o…"

"Just as divorce according to the Saviour's word was not permitted from the beginning, but on account of the hardness of our heart was a concession of Moses to the human race, so too the eating of fles…"

"Central to Jewish mysticism is the role that vegetarianism plays in messianic expectations: here vegetarianism functions in the concept of Jewish mystical time which chronicles human development from …"

"Trade unions and strikes cannot help in times of crisis when there is no demand for this “commodity”, they cannot change the conditions which, convert labour-power into a commodity and which doom the …"