Once you have decided to hit someone, then hit them hard because the retribution will be the same whether you hit hard or not. (Arab Proverb) - More Arab Proverbs...
He who has received a kindness forgets it; he who has been injured remembers it. [To benefit one and injure another at the same time is a losing game, for revenge is a stronger feeling than gratitude.] (Latin Proverb) - More Latin Proverbs...