...Paul, " the whole armour of God, that ye may be able to stand against the wiles of the devil. For we wrestle against principalities, against powers, against...the rulers of the darkness of this world," Eph. vi, 11, 12. Thus the devil, in the singular number, is equivalent to principalities, powers, and rulers,...

...most properly for their good ; but devils are over the wicked, in which respect they are said to be ' rulers of the darkness of this world,' Eph. vi. 12 ; and that in judgment, to execute vengeance on them ; and in this respect God may be said to make them principalities...