"[Scientists] penetrate into the recesses of nature and show how she works in her hiding-places. They ascend into the heavens; they have discovered how the blood circulates, and the nature of the air we breathe. They have acquired new and almost unlimited powers; they can command the thunders of heaven, mimic the earthquake, and even mock the invisible world with its own shadows" (Chapter 3).
Victor recalls a lecture from his professor that encouraged him to challenge the laws of nature. The idea of scientists 'acquiring new and almost unlimited powers' is incredibly appealing to Victor, who wants to make his own mark in the world; he sees his project, the reanimation of dead tissue, as an obstacle to overcome. Victor's experiment in creating the Creature is a perfect example of man versus nature, because in creating the monster, Victor challenges the natural order of life and death. Too late he sees his experiment as defying the natural order and then realizes that as a result his creation has the potential to be incredibly destructive and dangerous. Victor's creation is really a perversion of nature; he seeks to perform his own kind of "miracle" or usurp the role of both God and nature.