What does the Bible say about mortifying the flesh?

In Colossians 3:5, the Apostle Paul instructs believers to mortify their members which are from the earth, indicating a command to put to death the deeds of the sinful nature. This includes various sins such as fornication, uncleanness, and idolatry, which are intrinsically linked to our old man or sin nature. Mortification is an active, ongoing process fueled by the Holy Spirit, who empowers believers to turn away from sin and allows them to live in the newness of life through Christ, esteemed as their righteousness.