My pal Mike Humphrey got a question at his web site CPATS:
In the "Our Father" it says: "Forgive us our trespasses as we forgive those who trespass against us."
When we sin against a perfect God it takes that perfection to forgive that sin; so why would I ask God to forgive as I forgive, when as an imperfect creature the best I could do is forgive imperfectly?
Sincerely yours,
--Someone who has way too much time on his hands
The questioner has a real point. This prayer has a hook to it, a condition that perhaps we can't fulfill.
I could quibble with the idea that as imperfect creatures, we could *only* forgive imperfectly. After all, we aren't operating on our own unaided strength, but do have divine assistance. Our Lord wouldn't give us an assignment that's beyond the strength He gives.
When we're friends of God, friends of Jesus Christ, we are redeemed, and this redemption is not just an external imputation of righteousness (as in Luther's somewhat exaggerated expression about snow on a dunghill), but also a change that sanctifies us interiorly. Our Lord lives in us: He makes us "sharers of the divine nature" (2 Pet. 1:4) and strengthens our good acts with the supernatural virtues He places in us. He enables us to perform acts that are truly virtuous and whole. He empowers us to forgive fully with the help of His mercy.
We're called to do that, and occasionally we do; but alas, we often don't. We often don't cooperate fully with divine grace; we don't live up to the condition in that prayer, and yet we're stuck praying it, because that's what Jesus gave us to pray! He's revealing to us what the Father is like: he is holy, mighty, immortal, and merciful. We can live that mercy too toward others, precisely because He is holy, mighty, and immortal.