High Christology as a doctrinal stance was not enough to prevent the eventual apostasy of those in Asia Minor. Doctrine must produce the right conduct.
Hebrews 9 and 10 clarify the Atonement ritual of Leviticus 16. The author makes no mention of Satan, but says that Jesus bears our sins like the azazel goat.
Christ provides a model of how to live a godly life in the flesh, living life the way God lives it. Using His light, we can navigate our way in this world.