Devil, The

Devil, The, a being regarded in Scripture as having a personal existence, and, so far as this world is concerned, a universal spiritual presence, as everywhere thwarting the purposes of God and marring the destiny of man; only since the introduction of Christianity, which derives all evil as well as good from within, he has come to be regarded less as an external than an internal reality, and is identified with the ascendency in the human heart of passions native to it, which when subject ennoble it, but when supreme debase it. He is properly the spirit that deceives man, and decoys him to his eternal ruin from truth and righteousness.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)