"Forgiveness recognizes what you thought your brother did to you has not occurred. It does not pardon sins and make them real. It sees there was no sin. And in this view are all your sins forgiven."
"He who would not forgive must judge, for he must justify his failure to forgive."
Being forgiving isn't a state of "doing something", it's more like an attitude. You just have a forgiving attitude, ie you aren't condemning people, you don't judge, you don't attack. You welcome people regardless of what they seem to do.
When you stop being forgiving, you become "unforgiving", relentless, attacking, judgemental. When this has occurred, you've made an error and are attempting to find reasons why you cannot be forgiving, to justify the attack. This now requires some kind of "correction" so that you can ultimately return to the state of being forgiving all the time.
The correction for unforgiveness is of course forgiveness but being a state, it's the end result of whatever corrective, healing measures are needed to return there.
You need to find a way to restore your perception to truth in which you can see and recognize, there is no sin at all, sin isn't real, and there is nothing TO forgive. Then you're done with the correction, and have returned to BEING permanently forgiving.
"Forgiveness looks and waits and judges not" because it simply is a state of true perception, in which the truth is known to be true and nothing false is believed. Sin is not believed at all. In fact as Jesus says forgiveness and salvation and atonement are all words for the SAME THING. Forgiveness IS the atonement state.
What you do when you try to correct unforgiveness, is you're attempting to return to the atonement. To overlook the things you thought were true and real, and realize they are not. That effort "towards" awakening, is an effort to become more forgiving. You don't stop being forgiving, in attitude, just because there is nothing to forgive.
To forgive means to fore-give, to give ahead of time, so that through giving love you do not MAKE errors of judgement that have to then be cleaned up. If you make errors as a result of becoming unforgiving then now you have the task of having to "do forgiveness" or at least to do something, in order to try to get OUT of the unforgiving state into a forgiving state.
God IS forgiving, because otherwise we have to say he is unforgiving. But in this forgiveness, he KNOWS there is literally nothing TO forgive. Just as we're told that the Holy Spirit looks past error from the beginning so that errors are not made in the first place. The Holy Spirit is permanently forgiving as well. But being forgiving and "having something that has to be undone", are two different situations.
True forgiveness IS the atonement, it is the recognition that there is no sin, nothing has happened, and therefore "I need do nothing" because nothing has gone wrong. "Practicing" or "applying" forgiveness is more to do with the process of purification, in which you're attempting to become clearer about what is true and what is false, so that you can come to remember how to be forgiving and wake up to your permanently forgiving (non-attacking, non-judging) nature.