The devil represents the left hand path, he was cast down from heaven but is not the reason for humans sins, he doesn't tempt you. He represents going against gods word
Here's a good explanation
What Is the Left-Hand Path?
The left-hand path is considered to be about the elevation and centrality of the self as well as the rejection of religious authority and societal taboos.
The left-hand path focuses on the strength and will of the practitioner. It downplays the need for intercession by any high power although some may believe that a higher power exists.
Satanism (both LaVeyan and Theistic) and Luciferianism are considered left-hand paths. Followers of Thelema disagree whether it is a left- or right-hand path.
What Is the Right-Hand Path?
The right-hand path, in the words of left-hand path follower Vexen Crabtree, "concentrate[s] on the symbols of goodness, of the sun, of herd mentality and submission to god(s) and religious authority."
To put it a little more diplomatic, the right-hand path can be thought of as one of dogma, ritual, and a belief in the community and formal structure as well as a higher power. Though each of those can also be found in left-hand path religions, there is less focus on indulging the self in the right-hand path.
The vast majority of religions are considered part of the right-hand path, from Christianity to Wicca.