Now whether we like it or not, the fact is that the whole drama of redemption, as it is outlined in the Bible, simply cannot be understood as all unless you accept the Biblical doctrine with regard to the devil. It is an essential part of this message; it is here from the very beginning and right through to the end. (pg. 317)
Quote taken from Life in Christ by Martyn Lloyd-Jones © 2002 by Bethan Lloyd-Jones and published by Crossway.