When you feel that someone has wronged you in some way sometimes it may be difficult to think of that person without remembering the offense. Anger from past events may resurface and you find yourself succumbing to negative thoughts. One way it may be possible to help yourself detach from these thoughts and begin the process of forgiveness is to think about seeing this person in a new light.
Imagine, what type of person would they be if they were without fear? How would they treat the people around them if they weren't worried about having enough money, enough love, enough safety? If you can see them without their fear, without their guilt or regret, you can begin to see the light that shines in them. You can see the beauty of the true person inside. Just like the thought behind the word "namaste," the light in me sees the light in you.
Once you see that the perceived offense came from a place of fear it becomes easier to let it go. The ego of one can often clash with the ego of another, but when two hearts speak there is only love, peace, and harmony.