Forgive and forget?

My friend said that the forgetting is more important than the forgiving. I immediately thought of Suzie and Otto's article "Forgive and Forget? We Don't Think So!".
I asked my friend if he meant dealing with the emotions that I feel about what happened in the past. I said we don't forget what happened, yet we can change our emotional response to those times we recall what happened in the past.
As I thought about that conversation, it occurred to me that the intellectual exercise of forgiving is nowhere near as powerful as forgiving also from the heart.