How does God's sovereign grace ensure the salvation of believers?

Sovereign grace is the theological foundation upon which the belief in salvation rests. In 1 Peter 2:9-10, it is explained that believers are a 'chosen generation' and a 'royal priesthood,' which signifies God's active work in selecting individuals for salvation. This choice is not based on merit but is a demonstration of God's will and mercy. The promise of being 'a people' who were once not a people shows the transformative power of God's grace, which draws sinners into communion with Him and grants them a new identity and purpose. As God appoints some to belief, it underscores the assurance of salvation and the security of those who rest in His divine plan.