What does the excerpt from Mary Shelley's Frankenstein show about Victor's motives for creating the monster?

In her introduction to Frankenstein Mary Shelley concedes that her primary objective was essentially to compose a phantom story. She got the thought for what she later called her "repulsive descendants" amid the incredible summer of 1816, which she spent at Lake Geneva in Switzerland together with Percy Shelley, Lord Byron and Dr. John Polidori.

Mary Shelley made the story on a stormy evening in 1816 in Geneva, where she was remaining with her significant other, the artist Percy Bysshe Shelley, and their companion Lord Byron. Byron proposed they each compose a gothic apparition story, however just Mary Shelley finished hers.