No other animal is so deliberately cruel as man. No other creature intentionally imprisons its own kind, or invents special instruments of torture for the sole purpose of punishment. No other animal keeps its own brethren in slavery; so far as we know, the lower animals do not commit anything like the acts of pure sadism that figure rather largely in our newspapers. There is no torment, spite, or cruelty for its own sake among beasts, as there is among men. A cat plays with its prey,

but does not conquer and torture smaller cats. But man, who knows good and evil, is cruel for cruelty's sake; he who has a moral law is more brutal than the brutes, who have none; he alone inflicts suffering on his fellows with malice aforethought.

(from Susanne K. Langer : The Oxford Guide to Writing, Oxford University Press,1983.)

Question: Which expressions elsewhere in the paragraph restate the topic?