The sun should not set upon our anger, neither should he rise upon our confidence. We should freely forgive, but forget rarely. I will not be revenged, and I owe to my enemy; but I will remember, and this I owe to myself.

Charles Caleb "C. C." Colton (1780-1832) English cleric, writer, aphorist

Lacon: Or, Many Things in Few Words, Vol. 1, § 35 (1820)
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