As Christians we are given many gifts, and spiritual powers, but we should be careful not to take pride in them, nor forget that our gifts are intended to be used to glorify God, and not ourselves. Jesus warned His disciples of this, and we should heed his words as well... even though spirits are subject to us, our greatest joy should be in the fact that our names are written in heaven. If we are not saved, then we have nothing, and though we command an army of spirits we are still lost.