Fretting Pulls Us in the Wrong Direction
Psalm 37: 1+ 8
Fret not yourself because of evildoers, neither be envious of those who work unrighteousness (that which is not upright or in right standing with God). Cease from anger and forsake wrath; fret not yourself-it tends only to evildoing.

There will be times in our lives when we come in contact with people who agitate us with something they say or do which we consider harmful, hurtful or lacking in honesty and truthfulness. If we stay in this place of fretting it will rob our hearts of its peace, joy and positive focus and the consequences will be a heart replaced with worry, anger, distress and a tendency toward pessimism. The more we fret the more we will gravitate toward being unkind, spiteful and full of ill feelings ourselves. That is why the Lord cautions us over and over not to fret or be resentful toward those who are offensive to us.
When our hearts are fretful and full of anger we have three choices of what we can do with these harmful emotions: They can stay and reside in our hearts while they stunt our spiritual growth and make our physical bodies sick; we can put them on other people and abuse and damage them; or we can put them on Jesus who has the ability to take them and free us from their destructive nature.
If we choose to put our anger on Jesus our hearts will again find freedom, peace and joy as we process through and let go of the unpleasant emotions attached to our anger. Letting go of negative emotions enables us to forgive offensive people for what they do and who they are and allows us to place them in God’s hands and rest it. The process of working out emotions, letting go and forgiving will keep us from falling prey to fretting and is a life skill we will use over and over again (sometime on the same people) to come back to a place of rest.