The Christians in Jerusalem were getting ‘dull of hearing’, they were falling back. Paul addresses the fact that they should be teachers, due to the years they had been in Church, but they were falling backwards. He encouraged them to move beyond the milk of the word to perfection.
He laid out what the basic doctrines of Christianity are. In this sermon we are reminded that the basic doctrines start with repentance from dead works and that involves initially a simple choice between right and wrong, but that choice becomes deeper as we grow in the Church and realize that this choice is a daily mental choice and battle between the works of the flesh and the fruit of the Spirit.
Life, joy, and the ultimate glory make it all worth the effort. God wants us to choose correctly and succeed.