Jesus sent a contingent of 72 disciples ahead of him "into every town and place where he himself was about to go." The disciples had just returned full of excitement. I see them sitting around the table regaling each other with tales of exorcisms, baptisms, and conversions. Smiles. Congratulations. High fives. While I am sure Jesus is rejoicing with them, he also brings them back to earth.
"Hey, guys, talk about spiritual warfare. I was there when Lucifer and his multitude of followers were cast from heaven. I witnessed the heavenly mutiny. The divine rebellion. Ya'll ain't got nothing on me."
Jesus didn't remind them of this to be a killjoy. His intention was not to lessen what had taken place. However, Jesus was enough a student of human nature to realize the disciples' celebration was just one step away from hubris and self-aggrandisement. The deed would soon become the focus. Results would replace relationships.
Yes demons obeyed. Sure people were converted. But never forget our personal relationship with God. It is that relationship that is the key to all else we do. Our righteous acts, according to Isaiah, are but filthy rags. (Isaiah 64:10) There will be times when, because of our lack of faith, we will be powerless against the forces of evil. (Matthew 17:19-20) But our name inscribed in the Book of Life, now that is cause for celebration. Eternal life. A forever with God. There's the party. That is assurance, peace, rest. All else is possible because of our right relationship with God the Father. Without that, all else is meaningless.