Whoever loves his brother lives in the light, and so there is nothing in him that will cause someone else to sin.
As a schoolboy, the English author C.S. Lewis was often victimised by a teacher. He felt deeply hurt, and carried a scar for most of his life. Every now and again he would feel the sting, and give in to unpleasant thoughts about the teacher.
As Lewis matured, he realised that the wound would heal only if he forgave the teacher from his heart. He tried hard to reconcile himself to what had happened in childhood, yet he just could not get himself to forgive the wrong done to him. To make matters worse, he suffered from severe guilt-feelings because of his inability to forgive.
Finally, shortly before his death, Lewis wrote to a friend: “Only a few weeks ago, I suddenly realised that I had at last forgiven the schoolmaster who so darkened my childhood. I’d been trying to do it for years and each time I thought I’d done it, I found it had to be attempted again. But this time, I feel sure it is the real thing.”