Aristotle accounts the relation of tragedy to the chorus in ‘Greek Music Drama’; likewise, with the grand idea of the catharsis of pity and fear. Aristotle is a product of the decay of Greek culture: thus, despite his careful consideration of earlier philosophers, he has no real understanding of their greatness; likewise, Aristotle as both ‘powerful and harmless’ is exemplary of the man of science. Other themes in Aristotle include the account of time in terms of number and the notion of energeia.