In 1962 in Montgomery, Alabama, a Baptists preacher came home to find a crowd around his house that had just been bombed. The preacher ran inside and found his wife and daughter unharmed.
He then turned to the large crowd who wanted to retaliate, to punish, the white people for doing this. However, he said to them “Jesus tells us to love our enemies, to forgive those who persecute us. Now go home.” That Baptist preacher was Martin Luther King Jr. He did something that many people would never be able to do. He forgave people who did such wrong by him. But he had the Spirit of God with him and he lived according to it.
Ephesians 4:32 “And become useful and helpful and kind to one another, tender-hearted (compassionate, understanding, loving-hearted), forgiving one another [readily and freely], as God in Christ forgave you.”
Who do you hold a grudge against? Let it go, forgive, and seek God.