In Mary Shelley's Frankenstein, what are some similarities between Frankenstein and the monster?
Victor Frankenstein and the monster that he creates are more similar than Victor may want to admit. This is ironic because Victor considers his treatment of the monster a result of his utter repugnance at the appearance and, later, actions of the monster. Ultimately, though, Victor makes the monster be what he becomes.
Both Victor and the monster are ambitious in the novel. Victor's ambition is actually what leads him to create the monster because he wants to control the line between life and death. The monster later becomes ambitious in his own way when he learns language without any traditional education, only by observing the DeLacey family, and when he seeks out his creator to demand a female companion.
Most importantly, though, Victor and his monster are both vengeful, and they end up caught in a circular quest for revenge against each other by the end of the novel. Victor wants revenge for the Frankenstein family members and friends that the monster has killed. The monster killed those innocents, though, out of revenge because Victor ignored and abandoned him.
The monster and Victor Frankenstein can be considered foils, but ultimately they end up mirroring one another in a way that becomes destructive for them both.