"Flowers for Algernon" By Daniel Keys, published in Fantasy and Science Fiction.
Copyright 1959 by Mercury Press.

May 18

I am very disturbed. I saw Miss Kinn ian last night for the first time in over a week. I tried to avoid all discussions of intellectual concepts and to keep the conversation on a simple, everyday level, but she just stared at me blankly and asked me what I meant about the mathematical variance equivalent in Dorber- mann s Fifth Concerto.
When I tried to explain she stopped me and laughed. I guess I got angry, but I suspect I'm approaching her on the wrong level. No matter what I try to discuss with her, I am unable to communicate. I must review Vrostadt's equations on Levels of Semantic Progres- sion. I find that I don't communicate with people much any more. Thank God for books and music and things I can think about. I am alone in my apartment at Mrs. Flynn's boardinghouse most of the time and seldom speak to anyone.