“A nice man would feel ashamed even before a dog.”
Note-Book of Anton Chekhov (1921)
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Anton Chekhov 222
Russian dramatist, author and physician 1860–1904Related quotes
“I want a man as nice as my retarded dog, but one that doesn't crap on the floor.”
Source: The Idiot Girls' Action-Adventure Club: True Tales from a Magnificent and Clumsy Life
“Do not feel ashamed to forgive and forget.”
Nahj al-Balagha, Letter 53: An order to Malik Al-Ashtar
Variant: The best deed of a great man is to forgive and forget.

" Malcolm X: Make It Plain http://www.pbs.org/wgbh/amex/malcolmx/filmmore/pt.html," from The American Experience, season 6, episode 6, PBS (first aired 26 January 1994)
Attributed

“We would die before you would feel pain.”
El-Sisi addressing the Egyptians http://www.dailynewsegypt.com/2013/10/07/egyptian-people-will-never-forget-who-stood-with-them-or-against-them-al-sisi
2013
Warren G. Bennis; As cited in: Mark Fisher (1991) The millionaire's book of quotations. p. 15
1990s
Explaining the origins http://www.roger-zelazny.com/repository/absmag.html of his last book, A Night in the Lonesome October in an interview (Absolute Magnitude Autumn/Winter 1994)