The word slave is often in the Bible, sometimes in the context of the life position. Paul addresses people in slavery in many letters; 1 Cor. 7, Gal. 3, Eph. 6, Col. 3, and Phm. 1. Peter addressed slaves in 1 Pet. 2. The early church surely consisted of a large number of slaves.
The Bible’s main focus is not a person’s position in life. Rather, the Bible’s focus is a person’s conduct while in the position. Ethics and morality are the focus no matter the occupation and social position. Why? Because God orchestrates life events and opportunities, we orchestrate our response to them. The freedom of choice is to peacefully accept the things I cannot change, the courage to change the things I can, and thank God for the wisdom to know the difference.
God expects a slave’s response to accept the fact that they are subject to their master in everything, to try to please them, to not talk back to them (9). What should be the response if a master instructs a slave to violate God’s law? A slave, like all, must recognize that the Lord Jesus is the master of all. Joseph, when asked by his master’s beautiful wife to have sex with her refused and ran away. He obeyed the master of eternity, rather than the master of impermanence.