What is meant by being 'called out of darkness into His marvelous light'?

The phrase 'called out of darkness into His marvelous light' in 1 Peter 2:9 encapsulates the radical transformation that occurs in the life of a believer upon acceptance of the gospel. This calling signifies a movement from a state of spiritual ignorance and separation from God, often characterized by sin and rebellion, to a new life filled with the truth, grace, and holiness of God. It illustrates the believer's new identity as part of God's family, where they are enabled to see the reality of God's mercy, love, and righteousness. This calling is both an invitation and an empowerment by the Holy Spirit, allowing believers to experience and reflect the light of Christ in a dark world, which further emphasizes their role as a royal priesthood and a light to others (Matthew 5:14).