Yes Satan is part of what is infinite. Satan in mostly an unconscious force embedded in humanity. It is basically the identity of the personality or who we take ourselves to be. It acts like a judge telling us what is acceptable and what is not. It plays the roles of child/parent within the dynamics of our relationships. There is a more broad personality which is the collective personality that we've inherited through the generations. It's ingrained in the rules of society, the rules of social etiquette, in the civilized order. When we were children we were mostly free of the personality but as we grow into adults we identify with it more and more. It is not something bad. It is necessary but the trade as we become adults is seamless. One basically has to identify every single reason, every single way, every single event in their life that led them to adopt this identity of the personality as all of who they are. It is a huge undertaking that pretty much requires turning one's back on everything they think they know. One even has to be willing to give up their instinct to survive. It is no fun but in the long run it is too dangerous not to do it. It's like reverse engineering the self and then one day seeing so thoroughly and deeply into that self and realizing it is a falsehood.
The only thing that is left is what is real and that is like infinite and eternal emptiness and darkness. This is the beginning of the ego's introduction to reality and it's very counter-intuitive but he who tries to save their life will lose it and vice versa. This part really puts one to the test. I knew that I was literally going to hell, no if and or buts about it as I had just finally let go of my belief in God and Jesus. I was fully expecting eternal torment, hellfire, brimstone. It was TERRIBLE man, just terrible. In the end I got the opposite, however. Now I understand the worls: Those who wait on the Lord will mount up as eagles. That black infinite emptiness transformed from an absence to a presence. It is miraculous. It is the meaning of Jesus turing the water into wine. At that point I was quickly and easily ready to forget everything about the ego. I didn't honestly care about it and what it was trying to do at all. Now I realize yes, the personality is included in the soul and people tend to judge that as bad, again partaking in the habit of biting of the forbidden fruit. I too was of that kind. I am here to tell you my belief in the personality as me was the very thing that kept me feeling separate from this miraculous dimension. I realized Satan is a metaphor for this part of me that made me feel separate. I know I am not the only with this problem. The truth is Satan is not real, is a false identity, and has no power except that which we choose to give him and even that doesn't stand a chance to add even the tiniest particle of dust to the all-pervasive everlasting miraculous pure sanctity of God.