We are talking about Bro Eli teaching which is very deep and it is uncomfortable in the way that truth is often seen. Bro Eli doesn't fit forgiveness as a personality or fellow but it's just like a trauma that you need to respond to alone. This exposes us in the spiritual issue rooted in a sense of that christ-like love and this frame is very sobering.
What is important here is that the contrast is developed with God himself, a God which perfects memory and chooses not to remember sin at any time, that's not weakness. If God can deliberately forget then we constantly play all those affecting systems about what governs our heart then what it actually is, this contrasts about that false bringing back ugly memories and those modern habits of just justifying bitterness as a form of self-protection.
Scripture doesn't just talk about this situation anyhow, its names it gives us traces of the source of and backings of things being said in the scripture. The teaching forces us to keep examine ourselves as believers was the offense real well I am still holding it if love refuses the law then remember that hatred is just a natural things neutral thing. So these are truth forgiveness is not just about the alignments to the nature of course always.
Stay Blessed