If chapter five did not underscore the distinctiveness of the Christian life adequately, chapter six makes it abundantly clear. Worldly values and behavior have no place in the Kingdom of God, and those values are seen in sexual misbehavior (which includes homosexual behavior), thievery, greed, drunkenness, unethical business dealings and slander. Christians who engage in such shenanigans have no hope of living with God.
But Paul does not confine the list to these.
He includes Christians who cannot get along with one another, who mistreat one another to the point there is legal liability. Christians may have a right to the law courts of the land, but they may not use them on one another. To do so would be to submit the differences of princes and princesses to the courts of commoners. That’s how distinctive the Christian life really is. It is above the world, and should be lived above the world. We have become one flesh with the son of God Himself, a temple dwelling place for none other than the Almighty. We cannot act like mere people of the world. Our lives must be distinct from the world, and they must honor God in every way.