Matthew 6:14, 15

If you forgive men their trespasses, your heavenly Father will also forgive you. But if you do not forgive men their trespasses, neither will your Father forgive your trespasses.

Forgiveness is a big deal with God. Partially, because God shed the blood of His son Jesus for the forgiveness of our sins and because it blocks the ability for blessings to flow. Decide to forgive before offenses come no matter what they may be. Decide before it happens that benefits from God are more important. God did.