"You seek for knowledge and wisdom, as I once did; and I ardently hope that the gratification of your wishes may not be a serpent to sting you, as mine has been." - Frankenstein's Monster, Frankenstein
Nurture in relation to Frankenstein:
Victor writes how he is disgusted and doesn't like his creation which the monster finds out, and as the monster is rejected by humanity not because of his ugliness and the way he looks like, its because the monster doesn't learn to be human. Victor as the monsters creator or you could say the monsters "father", he doesnt have the encourgement from victor or the growth to be human, which shows that there is no nurture from victor towards the monster. As there is no nurture coming towards the monster because Victor disowns the monster, the monster doesn't know how to react and begins to terrorize Victor by killing his loved ones.
Since Victor created the monster in a unatural way and never nurtured the monster who was innately created in a unatural fashion, all he possibly needed was nurturing from Victor whom he considered his "father". Once the monster found out he was disowned, the monster goes on a war path on victors loved one due to the lack of being nurtured by the one he needed the most, so by lashing out to hurt Victor to get back at hurting him.
The monster has come a long ways from when he started, and even then it is not sure if all of this was because of everything he learned from his senses, or if he was born with the abilities to understand these because of his nature. However, this, along with Nature, all lead to the downfall of Victor Frankenstein.