In "Flowers for Algernon" by Daniel Keyes, how has Charlie changed since the operation? What has he gained and what has he lost?

In Daniel Keyes' story "Flowers for Algernon," a mentally handicapped man named Charlie is given an operation to increase his intelligence. Charlie has worked at Mr. Donnegan's factory for some years at this point, and he feels as though he has many friends there. As his intelligence increases though, he realizes that what he took for friendship was really one sided. He loved his co-workers, but what they loved about Charlie was the fact that...

In Daniel Keyes' story "Flowers for Algernon," a mentally handicapped man named Charlie is given an operation to increase his intelligence. Charlie has worked at Mr. Donnegan's factory for some years at this point, and he feels as though he has many friends there. As his intelligence increases though, he realizes that what he took for friendship was really one sided. He loved his co-workers, but what they loved about Charlie was the fact that they could make fun of him and use him. Even though he now knows that many of them never really were his friends, he misses what he believed was a certain camaraderie with them. The workers also begin to resent Charlie because he is now so much smarter than they are. He comes up with ways to save the factory money, but instead of being happy for Charlie, his co-workers dislike him more and more. Charlie also eventually becomes even more intelligent than his doctors. His intelligence far surpasses his teacher, Miss Kinnian, and the relationship he once hoped for with her becomes impossible.