hell the whole original nature of the dark side of the force is the more it is used the heavier it ways upon you and becomes more addictive.
Lucas obviously stole the nature of the one ring from tolkien's lord of the rings for the dark side, and tolkien borrowed the curse theme from northern myth and infused it with the symbolism of mans fallen nature.
even a non christian such as lucas must be aware of the temptation scenes in literature such as paradise lost. he could not have been unaware of the belief of sin to christians even though he does not believe such concepts.
anakin's sin is essential that of adams the desire for knowledge which in the end leads to power and corruption.