Why does Les keep emphasizing that Jesus is the eternal creator God?
The emphasis guards against teaching, especially New Age theology, that reduces Christ to merely another prophet or one name among many gods. Because the Lord Jesus is the author and finisher of faith and the eternal creator God of the universe, that truth must be defended and never lost.
Les explains that believers live in a time when New Age people are growing by leaps and bounds and are reducing Christ to nothing but another prophet, just another name among the gods. He warns that we must be careful never to be taken in by such theology or teaching. Instead, we must never lose sight of the fact that the Lord Jesus we serve—the very author and finisher of our faith—is the eternal creator God of the universe. That is why he says he will never stop emphasizing it, then turns to Colossians 1:15 to show Christ as the all in all.