What does it mean to be a holy nation according to the Bible?

In 1 Peter 2:9, Christians are referred to as a 'holy nation,' emphasizing that they are distinct and set apart for God's purposes. This holiness reflects God's character and is evidenced in a life that pursues righteousness and obedience to His commandments. The pursuit of holiness is not through human effort but through the transformative work of the Holy Spirit, enabling believers to live lives that please God. The call to holiness also serves as a witness to the world, showcasing the glory and grace of God through our actions and testimonies.