Flowers for Algernon (Spoiler Alert!!)
Caring and kind-hearted, the "retarded" Charlie thinks highly of everyone, even though he does not realize that people use him to make themselves look smarter. For instance, Charlie considers Joe and Frank his good friends, yet they pick on him in an attempt to appear smarter. Except for being constantly picked on, Charlie is very fortunate, for he lives in a good home instead of having to live at the Warren Institution and he also has a stable job at a local New York bakery.
Hurt by what his mother did to him as a child, "intelligent" Charlie periodically remembers moments in his childhood, most of them where his mother is beating him for being mentally challenged, kids at his school are beating him, or his sister is getting him in trouble. When he goes to make amends with his mother and sister all is going well until his mentally unstable mother brings out a kitchen knife. His sister apologizes for the rude things she had done as a child, though after Rose (Charlie's mother) brought out the kitchen knife Charlie leaves with tears in his eyes.
Algernon was the only thing that could relate to Charlie, going through similar ordeals of fits of rage followed by laziness and tiredness followed by the loss of motor skills and intelligence. Also, they were both guinea pigs who were experimented with, the doctors priding themselves on calling them their "creations," and treating them like "[they] were the main attraction of the evening, and when [they] settled, the chairman began his introduction. [Charlie] half expected to hear him boom out: Laideezzz and gentulmennnnnn. Step right this way and see the side show! An act never before seen in the scientific world! A mouse and a moron turned into geniuses before your very eyes!" Finally, many people felt sorry for Charlie as he started to mentally deteriorate, saying that they "understood", yet Charlie knew that the only person who understood what he was going through was a mouse.
Rude and self-centered is what the intelligent Charlie had become, primarily focusing on work, work, work. When he first began to "date" Fay, he would drink and go dancing with her. After awhile, he slowly became a hermit, ignoring her and rejecting her invitations to dance. Also, when Alice took care of him while he was becoming retarded again, he did not appreciate the things she had done for him, such as cleaning the house and paying his rent and instead griped and told her to get out of his apartment.
Little by little, Charlie lost his memory and his intelligence. What was painful to him is that he knew he was becoming mentally and physically slower, trying to fight it as much as possible. Although he did not succeed in fighting the declination, when he went back to being mentally retarded he knew that he was a help for the science world, even though he did not quite remember what he did.
In a matter of months, Charlie became a genius who spoke twenty languages and read countless articles and books. More importantly, he learned how the world looked at mentally challenged people and how they looked at him. He realized people were not as nice as they had previously seemed to be, for he realized that Joe and Frank were not his friends, they just made fun of his stupidity.
Elated that he had met someone as frank and independent as Fay, her different approach to life changed Charlie for the better. He learned to not have as many "lines" in his house and more importantly, he learned how to have a really good time. Though dancing was not what he enjoyed, Fay and Charlie would drink and laugh and regularly visit each other. Before Fay, Charlie primarily studied all the time but after he met her, she put some spice into his life.