Here are a few pertinent words from John Calvin in light of yesterday's sermon on Jesus and Demons.
Yes, the devil is called the prince of this world. But what of it? Jesus Christ holds him in check for He is King of heaven and earth.
There are devils above us in the air who make war against us. But what of it? Jesus Christ rules above, having entire control of the battle. Thus, we need not doubt that He gives us the victory.
John Calvin, Deity of Christ