Thus men continue to accuse themselves of being unjust, violent, cruel, and treacherous to one another, but they do not accuse themselves of cutting the throats of other animals and of feeding upon their mangled limbs, which, nevertheless, is the single cause of that injustice, of that violence, of that cruelty, and of that treachery. … Men believe themselves to be just, provided that they fulfil, in regard to their fellows, the duties which have been prescribed to them. But it is goodness which is the justice of man; and it is impossible, I repeat it, to be good towards one's fellow without being so towards other existences.
It is a specious but very false reason to allege that, since man has acquired this taste, he ought to be permitted to indulge it — in the first place because Nature has not given him cooked flesh, and because several ages must have rolled away before fire was used. … Nature, then, could have given man only raw or living flesh, and we know that it is repugnant to him over the whole extent of the earth.