What does the Bible say about mortification of sin?

The Bible, particularly in Colossians 3:5, commands believers to 'mortify therefore your members which are upon the earth.' This concept of mortification involves putting to death the sinful actions and desires that are part of our old nature. Paul describes these sinful behaviors, such as fornication and covetousness, as idolatry. Our motivation for this mortification comes from our spiritual union with Christ, as those who are risen with Him are called to seek the things that are above, focusing on our heavenly citizenship rather than earthly desires.