The creature, in Mary Shelley's Frankenstein, finds Paradise Lost and begins to read it. After reading the novel, the creature comes to have feelings regarding his parallel to Adam. The creature explains, in chapter 15, his understanding of the novel and his likeness to Adam.
It moved every feeling of wonder and awe that the picture of an omnipotent God warring with his creatures was capable of exciting. I often referred the several situations, as their similarity struck me, to my own. Like Adam, I was apparently united by no link to any other being in existence; but his state was far different from mine in every other respect.
Here, the creature recognizes that his only link to another (similar to Adam's sole connection to God, given God was his creator) is that Victor created him.
After this initial recognition is made, the creature also recognizes that he is very different from Adam. The creature goes on to describe how he is different from Adam.
I sickened as I read. ‘Hateful day when I received life!’ I exclaimed in agony. ‘Accursed creator! Why did you form a monster so hideous that even you turned from me in disgust?
Therefore, the creature's only parallel to Adam was that he is only linked to Victor (and no one else). It is this knowledge which allows the creature to make another connection: he is more like Satan than Adam. The creature, after reading Victor's journal regarding his creature's existence, finds that he has been alienated and exiled like Satan.
The creature relates to Adam because he feels like he, too, has been hated and shunned by his creator in spite of his attempts to be and do good. He feels like his creator has abandoned him in a world that hates him for being what his creator made him to be. He feels alone in the world and asks that a help-meet (partner) be created for him. When his creator denies him even that, it further angers the creature.