The book of Colossians discusses holiness and what it means to be holy. It encourages believers to set their minds on heavenly things rather than earthly concerns. It instructs Christians to put off their old sinful nature and put on the new self through Christ. Holiness is presented not as a list of rules but as living a life of obedience and faith motivated by God's grace. Believers are called to do all things in the name of Jesus Christ with wholehearted dedication to God.