Now what is it moves our very heart, and sickens us so much...

Now what is it moves our very heart, and sickens us so much as cruelty shown to poor brutes? I suppose this: first, that they have done us no harm; next that they have no power whatsoever of resistance; it is the cowardice and tyranny, of which they are the victims, which make their sufferings so especially touching. There is something so very dreadful, so satanic in tormenting those who have never harmed us, and who cannot defend themselves, who are utterly in our power.