Jesus was drawing the analogy between freedom & bondage…slaves & freemen. In the Greco-Roman society of the time, slaves were considered property and the lowest strata in society with no rights…living under the absolute dominion and control of their masters. But for the Jews, their customs were much more personal in respect to slaves…regarding them as a limited part of the family, but without rights to an inheritance as a lawful son would have. So by making this comparison between freedom & bondage, Jesus was simply saying that slaves obey their masters, whether it’s the cruel master of sin or the Lord God Almighty. And this bondage to sin keeps us fettered in slavery…clouding our minds, degrading our feelings, and enslaving our will. But true freedom in Christ, accomplished through the life, death, & resurrection of Jesus on our behalf, liberates & breaks the chains of slavery to sin…allowing us to freely serve God and fulfill His plan & purpose in our life.