I love science. I'm far from being a scientist, but I love the observation of "the way things are".
And one of the "way things are" is that we are "fearfully and wonderfully made" (Psalm 139:14).
And one of the ways we are fearfully and wonderfully made is in how our soul (mind, emotions and will) affects our body.
And one of the ways our soul affects our body is in the devasting effects of unforgiveness.
We might assume this from the Scriptures, and rightfully so, but it is science which has actually demonstrated that the following is true:
"Resentment is like taking poison, and waiting for the other person to die."
Self-interest is not as high a motive as Spirit-filled obedience to our loving God, but it doesn't hurt to hear the words of scientists who have studied unforgiveness. They have universally found that unforgiveness, bitterness, anger, etc., cause increases in heart rate, blood pressure, cortisol (a fat-producing hormone), nervousness, adrenalin, restlessness, sadness, cardiovascular disease, relationship problems (duh..), and immune deficiency.
But forgiveness is only possible as we draw near to our Lord. As we commune with Him through the Word of God and prayer, as He expresses His Life through us, as we are filled with His Spirit, and as we walk by the Spirit, forgiveness is as natural as the fruit of the Spirit, which is love. Fellowship with Him. Practice His Presence. Let go of the resentment.
May grace and forgiveness govern our relationships. Healing balm for our souls and bodies. Isn't science something?