What does the Bible say about being a saint in Christ Jesus?

In Philippians 1:1, Paul addresses the church as 'saints in Christ Jesus,' indicating that these individuals have been chosen and sanctified by God for a specific purpose. This designation signifies a transformed state, as believers were once in darkness but are now brought into the light of Christ through God's act of grace. As Ephesians 5:8 affirms, believers have been called to walk as children of light, illustrating the change in their identity and standing before God. Being a saint signifies not only a change in moral character but also a new relationship with God, marked by fellowship with Jesus.