The Devil Came from Kansas is a song about how "demons" are a thing that people find coming to them not from some dark and remote hell, but from within. A personal demon is a fear or an addiction, a "monkey" that rides on your back that you can't get rid of, or a sense of guilt, sinfulness, and self-condemnation, or a sense of impending doom. This song is about how these things can take hold of you like a torment that cannot be escaped.
The Devil Came from Kansas is a song about how "demons" are a thing that people find coming to them not from some dark and remote hell, but from within. A personal demon is a fear or an addiction, a "monkey" that rides on your back that you can't get rid of, or a sense of guilt, sinfulness, and self-condemnation, or a sense of impending doom. This song is about how these things can take hold of you like a torment that cannot be escaped.