Hugh Black (March 26, 1868 – April 6, 1953) was a Scottish-American theologian and author. He was quoted in my daily devotional reading.
“We have cause to suspect our religion if it does not make us gentle, and forbearing and forgiving; if the love of our Lord does not so flood our hearts as to cleanse them of all bitterness, and spite, and wrath. If a man is nursing anger, if he is letting his mind become a nest of foul passions, malice, and hatred, and evil wishing, how dwelleth the love of God in him?

For more about forgiveness see: