en_tn_condensed/col/03/09.md

you have taken off the old man with its practices

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. The old and new self mean the same as the old and new man. The term "old man" probably refers to the sinful nature with which a person is born. The "new man" is the new nature or new life that God gives a person after they come to believe in Christ.