Could this be a modified version of the gospel from what we now recite? Jesus had yet to die for the sins of the world, the disciples were unclear as to the reality of His approaching death, and as we see a few verses from here the disciples were directed not to reveal that Jesus was the Christ. If so, what did this gospel look like? Perhaps as Jesus had been teaching "The kingdom of God is like unto...."
Notice that it is the serving of other gods that God is primarily concerned with. People often say "I haven't sinned". I'd ask what other gods have you served. The trick is not to "believe in a god" it is to "believe the God" and to serve Him alone.
We want to know the whole plan start to finish often before we will invest ourselves into it. Many times the Lord only reveals only the one small step that comes up next. Daily bread so to speak. Trust and acknowledge...He will direct!
It is not that the Lord has just become omnipotent and reigns, it is that He always has and always will. Remember that this present vanity we've been subjected to comes out of a hope kjv@Romans:8:20, what better hope than to come to know Him for who/what He truly is. One can say the Lord is omnipotent but, what does that mean until all involved have experienced that? One can say the Lord is full of compassion in the same sense, what does that mean until all involved have experienced it? This then is a time when all of us have experienced the experience and we can conclude with knowledge and eternal confidence that this Lord God reigns omnipotent. These are not now just words!