Christians should forgive one another by remembering the forgiveness they themselves have received from God.
The process of forgiving one another as Christians is deeply rooted in the remembrance of God's forgiveness towards us. Christ taught in Matthew 18:21-22 that we are to forgive not just a few times, but endlessly, mirroring His infinite grace. As Paul teaches in Colossians 3:13, we are to bear with one another and forgive grievances, just as the Lord forgave us. This calls for a conscious effort to let go of offenses, keeping in mind that our ability to forgive stems from understanding our own need for forgiveness. Moreover, our forgiveness should be genuine and from the heart, as indicated in Matthew 18:35, where refusing to forgive puts us at risk of divine judgment. Thus, Christians are to forgive out of gratitude for their own redemption and as an act of obedience to Christ.
Scripture References:
Matthew 18:21-22, Colossians 3:13
Commentary