A flash of lightning illuminated the object, and discovered its shape plainly to me; its gigantic stature, and the deformity of its aspect, more hideous than belongs to humanity, instantly informed that it was the wretch, the filthy demon to whom I had given life.

This Chapter 7 quote occurs as Victor travels home after hearing the news that William, his closest friend, has been murdered. Amid a storm, Victor believes he sees his creature, and he suddenly realizes that the monster he created is responsible for William's death. His visceral reaction is one of absolute horror; he describes him as "hideous," "a wretch," and a "filthy demon," terms that reveal how deeply disgusted and frightened he is of the being that he once believed would be his greatest achievement.