He appointed Twelve, whom he also named Apostles, that they might be with him and he might send them forth to preach and to have authority to drive out demons. Mark 3:14–15
The Twelve Apostles were first called by Jesus and then sent to preach with authority. The authority they were given was for the purpose of driving out demons. But how did they do that? It’s interesting to note that the authority they were given over demons was, in part, associated with their commission to preach. And though there are some recorded instances in the Scriptures of the Apostles driving out demons directly by command, it should also be understood that the preaching of the Gospel with the authority of Christ has a direct effect of driving out demons.
Demons are fallen angels. But even in their fallen state, they retain the natural powers they have, such as the power of influence and suggestion. They seek to communicate with us to deceive us and draw us away from Christ. The good angels, of course, also exercise this same natural power for our good. Our guardian angels, for example, constantly seek to communicate to us the truths of God and His grace. The angelic battle for good and evil is real, and as Christians we must be aware of this reality.
One of the greatest ways to confront satan and his demons is to listen to the Truth and to proclaim it with the authority of Christ. Though the Apostles were given a special authority for their preaching, every Christian, by virtue of their Baptism and Confirmation, is entrusted with the message of the Gospel to proclaim in various ways. And with that authority, we must constantly strive to bring forth the Kingdom of God. Doing so will have a direct impact on the diminishment of the kingdom of satan.
Reflect, today, upon your duty to share the Gospel with others. Sometimes this is done by an explicit sharing of the message of Jesus Christ, and at other times the message is shared more by our actions and virtue. But every Christian is entrusted with this mission and must learn to fulfill that mission with true authority, knowing that as that authority from Christ is exercised, the Kingdom of God increases and the activity of the evil one is overcome.
My all-powerful Lord, I thank You for the grace You have given me to proclaim the truth of Your saving message to those whom I encounter every day. Help me to fulfill my mission to preach in both word and deed and to do so with the gentle yet powerful authority given me by You. I offer myself to Your service, dear Lord. Do with me as You will. Jesus, I trust in You.