1. Not everyone has the authority to use His name. The vagabonds tried to imitate Paul.
  2. Not everyone will be acknowledged for using His name.  You have to believe to use his name.  He used an evil spirit to get them to believe.
  3. Not everyone will be against the use of the name.  One evil spirit against seven of them and they ran naked and wounded.

We must Cherish the Name of Jesus!