Man is subject to innumerable pains and sorrows by the very condition of humanity, and yet, as if nature had not sown evils enough in life, we are continually adding grief to grief and aggravating the common calamity by our cruel treatment of one another.
* Joseph Addison
Cruelty is, perhaps, the worst kid of sin. Intellectual cruelty is certainly the worst kind of cruelty.
* G. K. Chesterton
Fear is the parent of cruelty.
* J. A. Froude
Cruelty is contagious in uncivilized communities.
* Harriet Ann Jacobs
Cruelty would be delicious if one could only find some sort of cruelty that didn't really hurt.
* George Bernard Shaw
The vast majority of the race, whether savage or civilized, are secretly kind-hearted and shrink from inflicting pain, but in the presence of the aggressive and pitiless minority they don't dare to assert themselves.
* Mark Twain