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
Refusing to forgive others keeps us underwater - drowning in our own misery. We suffer while the one who harmed us moves on.
This has to be one of the toughest teachings of Christ. Forgiving people who wrong us requires an extra measure of strength. Our pride tells us to hold the grudge - Jesus says to let it go. Which do you choose to follow... self... or Jesus?
Forgiveness is the core nature of God, and It's God's perfect design for our daily life.
Today, pray for strength to forgive that person who wronged you - let it go. This may be the very anchor keeping you from joy, happiness, contentment, and success.