"Return to your home, and declare how much God has done for you.”And he went away, proclaiming throughout the whole city how much Jesus had done for him."
Jesus cast a load of demons (legion) out of the guy referred to in the above verse. And then commissioned him to proclaim the works of God. Check out who he proclaims!
We get a little hint here to something that Jesus plainly says elsewhere in the Gospels.
Jesus is God.