The devil knows the importance of forgiveness and as such crawl in with the spirit of pride in the hearts of the offended so he/she can hold the grudge forever.
But you have well said sir, its not the person eho has offended you that you are doing any favour but your very self and only this knowledge will help us. Until you get tp that point where you can genuinely smile, hug and share good moment with anyone who offends you, you havent forgiven.
This is Deep. But the good lord help our hearts. Cheers to you sir for this beautiful piece.