Before one can cast out demons one must know what an unclean spirit really is. Satan has nothing to do with demons and those who invoke Satan’s name lie just to confuse. The power lies in the knowledge of truth, which this short message will help you understand. Binding principalities and powers is not enough, because they must be replaced with new principalities and powers since the old ones have become corrupt. Romans 13:1 specifically speaks of governments, which God establishes.
To understand the truth and act upon the truth and only the Truth is the true power and the results are astounding. I speak from experience and not theory.