In Matthew 6:14-15 Jesus connects our willingness to forgive others with God’s willingness to forgive us. In order for followers of Jesus to experience the joy of being forgiven, pray that no one who has been hurt by another will harbour bitterness or resentment in their heart.
For if you forgive other people when they sin against you, your heavenly Father will also forgive you. But if you do not forgive others their sins, your Father will not forgive your sins. Matthew 6:14-15