Ephesians 6:9 Masters, do the same to them, and stop your threatening, knowing that he who is both their Master and yours is in heaven, and that there is no partiality with him.
Just as with the preceding verses to this one, people have often used this to justify the notion that the Bible upholds slavery. No! Read it again.
This passage isn’t saying “own slaves.” The fact is that many people during the time period in which this letter was written by Paul found themselves slaves for whatever reasons. It could have been because they had a debt that they couldn’t pay or that they couldn’t afford to take of their child so they sold them into slavery. No matter what the reason, there were people who were the servants of other people.
That’s not the point of Paul’s message, though. He’s not speaking on the right to own a slave or on the reasons for being one. He’s talking about loving and respecting everyone, regardless of your standing of your position. If you’re under someone’s authority (and we all are), obey them and respect them. If you’re over someone in a position of authority, show them respect and care for them, don’t mistreat them.
In the eyes of God, there is no distinction between the master and the servant. He is the Master over all. That means no one is in a position to treat others badly, especially if they call themselves a child of God. Most people don’t have servants or slaves today, but we do have bosses and subordinates. Regardless of which of those we’re dealing with, the command is the same: treat them with the love of God and with respect.