A key is this: Know that what you call “the light of forgiveness” is important to you. Know further that it could fade in you if you do not give it the attention it deserves. Aristotle emphasized practice as a way to grow in the virtues. The more you practice forgiveness, the better you become at it. The better you become at it, then the more you develop what Aristotle called a love for the virtue.
In my book, The Forgiving Life, I focus on what I call the strong will. You need this strong will to persevere in the practice of forgiveness, even though all around you are opportunities to ignore forgiveness and seek pleasure to avoid pain. Forgiveness can be painful work, but the pain, in my view, is far less than carrying the pain of deep resentment for many years.
I wish you the best in your persevering journey to develop a love of the virtue of forgiveness.
Learn more at The Forgiving Life.