Here Paul is speaking of a Christian's rejecting his old sinful life as if it were an old garment that he takes off in order to put on a new garment. It was very common for Israelites such as Paul to speak of moral qualities as if they were pieces of clothing. (See: [[rc://en/ta/man/translate/figs-metaphor]])
These terms are examples of the categories of people that Paul says do not matter for God. God sees every person alike, not by race, religion, nationality, or social status. AT: "race, religion, culture, and social status do not matter" (See: [[rc://en/ta/man/translate/figs-metonymy]])
This is someone from the land of Scythia, which was outside the Roman Empire. Greeks and Romans used this word for someone who grew up in a place where everyone did wicked things all the time.
Nothing is excluded or left out of the rule of Christ. AT: "Christ is all important and lives in all his people" (See: [[rc://en/ta/man/translate/figs-explicit]])