So the concept of forgiveness, in the Christian sense, is rather to be understood in such a way that there is no longer any secret, deeply hidden resentment, but that honestly felt forgiveness has extinguished all negative feelings.

I understand what you are describing very well, I wouldn't feel any differently! That's why I find the predetermined Christian concept somewhat dishonest in this respect. I believe that only very few people are capable of this deep, honest forgiveness...

I apologise if I "misuse" your post for this discussion - I am very interested in such considerations and I thought it was appropriate here ;-))