We have to realize that forgiveness, as the late Lewis Smedes said, is an imperfect enterprise for imperfect people. It is common to have forgiven and then to be triggered by something unexpected, whether it is a dream or meeting the person for the first time, as examples. Because you already know the path of forgiveness, I recommend that you get your backpack on again, and your hiking shoes, and travel the forgiveness road once again. This time it may be quicker with deeper results. And please do not be discouraged if and when you have another trigger for your anger in the months or years ahead. Go on the forgiveness journey once again.