After ascending to the summit of Montanvert, Frankenstein meets the monster, or, as he puts it, "the wretch," that he created earlier in the story. The monster in this passage is presented as superhuman. He advances "with superhuman speed . . . bound(ing) over the crevices," and his stature "seemed to exceed that of man."
Despite the superhuman speed, agility, and strength of the monster, Frankenstein is at first determined to meet with it "in mortal combat." He perceives the monster as just that, a monster, and worse, as a devil. But ironically, the creature in this passage comes across as the more rational of the two, and he offers Frankenstein a deal. He offers Frankenstein peace if he creates a wife to keep him (the creature) company.
The creature in this passage also reminds Frankenstein that he is its creator. The creature is Frankenstein's "Adam," and he has been rejected by his God (Frankenstein), just as Adam was rejected by his. Thus, we are reminded in this passage of the fact that the creature that Frankenstein meets here, in the mountains, is a creature, or a devil, of his own making.