Matthew 6:14-15 NIV For if you forgive men when they sin against you, your heavenly Father will also forgive you. But if you do not forgive men their sins, your Father will not forgive your sins.
Colossians 3:13 NIV Bear with each other and forgive one another if any of you has a grievance against someone. Forgive as the Lord forgave you.
Ephesians 4:31-32 NIV Get rid of all bitterness, rage and anger, brawling and slander, along with every form of malice. Be kind and compassionate to one another, forgiving each other, just as in Christ God forgave you.
Man has two great spiritual needs. One is for forgiveness. The other is for goodness. Billy Graham.
I firmly believe a great many prayers are not answered because we are not willing to forgive someone. D. L. Moody