It appears to me the lesson is showing us that we have two choices,
1) We have the freedom to chose bondage, which limits and diminishes every future possibility to choose.
2) We can also chose freedom, freedom from bondage, which gives us the freedom to keep on choosing liberty with every new choice we make.
All of us have made the first of these choices at some time in the past. God's grace makes it possible for us to break with the past and start a new life of liberty which brings us eternal freedom, freedom from bondage to sinful habits.