Forgetting a wrong is a mild revenge

I am looking for the origin and any other info on a saying "Forgetting a wrong is a mild revenge". Thank you in advance.

To forget a wrong is the best revenge. Regional distribution: Texas. First citation: 1732 Fuller, "Gnomologia." From A Dictionary of American Proverbs edited by Wolfgang Mieder & Others (Oxford University Press, Oxford and New York, 1992).