Dealing with evil spirits: In the name of Jesus

The following excerpts on dealing with evil spirits is from Kenneth Hagin's book 'The Triumphant Church' :

"I asked Jesus, "Lord, how do I deal with the evil spirit in this woman?" The Lord answered, "You just simply say, You foul spirit that is operating and manifesting yourself in the life of ______________ (and Jesus called the woman's name), I command you to stop in your operations. I command you to cease and desist in your

maneuvers, in the Name of the Lord Jesus Christ."

 

I said, "Is that all I have to do?" I thought perhaps I would have to prepare myself and get ready or some big battle or something.