I ardently hope that the gratification of your wishes may not be a serpent to sting you, as mine has been.
Letters, Letter 4 · Victor Frankenstein
Context
Victor warns Walton that achieving his ambitious goals might bring disaster, using his own experience as a cautionary example.
Analysis
The serpent metaphor activates Biblical resonance—the snake in Eden that brought knowledge and ruin simultaneously. By collapsing "gratification of your wishes" and "serpent to sting you" into the same event, Victor suggests that the danger isn't a side effect of ambition but is woven into the achievement itself; success and destruction arrive together, making the pursuit of knowledge inherently tragic.
Essay Tip
Use this to argue that Shelley structures ambition as paradox rather than simple cautionary tale—the serpent image means that getting what you want IS the poison, so the novel questions whether certain knowledge can ever be safely possessed, not just safely pursued.