It is not "forgive and forget" as if nothing wrong had ever happened, but "forgive and go forward," building on the mistakes of the past and the energy generated by reconciliation to create a new future.
The sin was mine; I did not understand. So now is music prisoned in her cave, Save where some ebbing desultory wave Frets with its restless whirls this meagre strand.
If little faults proceeding on distemper
Shall not be winked at, how shall we stretch our eye
When capital crimes, chewed, swallowed, and digested,
Appear before us?
Learning to forgive is much more useful than merely picking up a stone and throwing it at the object of one's anger, the more so when the provocation is extreme. For it is under the greatest adversity that there exists the greatest potential for doing good, both for oneself and others.