Try pulling a real big tree out with your hands.
After a while you'll just get tired, give up, and welcome it as your back support.
There's no reason to think anything of not forgiving someone, or some situation that you sit on year, after year, because we don't see what's up ahead, if we did we would't entangle ourselves with some things we shouldn't.
An unforgiving spirit, grows real very long and very , very deep roots, those roots entangle you, and bind you like a chain.
Like a vine entwined, more vines wrap around and
once I tried to pull vines leaves on roots out no matter how I struggled, I couldn't budge it out of the soil. It needed to be cut, and some were not cutable.
When something like this gets a hold in your spirit, it's antagonist of anger, and the rest will join in the infected spirit.
Something that is not treated could cause catastrophic physical results, insults, same as if the spirit goes unprotected, untreated, or unhealed, it could turn into a bad disaster.
We all get offended, the word says, it's not possible that offenses do not come, but remember that "All things are possible with God" and he turned the water into wine, he will do the same for those who call him @ Psalm 91 :15.