Of all the petitions that Jesus taught His disciples to pray, the only one He clarified after the final amen, so to speak, was the request for forgiveness. There’s certainly more that Jesus could have said about the coming of His kingdom; that could have been really helpful for our eschatology. He could have said more about what things are like in heaven and how that would translate here on earth. Instead He followed up on forgiveness.
Not only is forgiveness comparative, the Father forgives as we forgive others, forgiveness is conditional. “For if you forgive others their trespasses, your Heavenly Father will also forgive you, but if you do not forgive others their trespasses, neither will your Father forgive your trespasses” (Matthew 6:14-15). The key word in verse 12 is as, the key word in the clarification is if.
We believe that the Bible doesn’t contradict itself. We believe that salvation is through grace alone by faith alone in Christ alone. Salvation is not by obedience, including our obedience to forgive others. In fact, if we were actually justified by our forgiving then none of us could be forgiven. The psalmist asked, “If you, O LORD, should mark iniquities, O Lord, who could stand?” So also, If God should mark our resentment toward those who’ve sinned against us, who could stand?
There must be some way to understand this qualification without seeing it as a way of “practicing our righteousness before other people”; who has ever said, “No wonder God likes me so much, I always forgive”? Yet the condition in verses 14-15 is as easy to shake off as DNA, meaning, we can’t. There is a spiritual reality in place. Sons of the Father act like the Father. If we are not forgiving, what makes us think that we are sons of the Father of forgiveness? If we are not forgiving, what makes us think that He accepts hypocrites?
So, if you don’t or won’t or just can’t forgive, then why do you think you should be forgiven? If that’s the case then you don’t want forgiveness, you want acknowledgement from God that you don’t need it. But that is just what you can’t have.