"The Mortal Immortal" by Mary Shelley

"The Mortal Immortal" is a short story from 1833 written by Mary Shelley. It tells the story of a man named Winzy, who drinks an elixir which makes him immortal. At first, immortality appears to promise him eternal tranquility. However, it soon becomes apparent that he is cursed to endure eternal psychological torture, as everything he loves dies around him.