How do we know that we are citizens of God's kingdom?

Our citizenship in God's kingdom is not something we earn but is granted through being 'born from above' as Jesus explained to Nicodemus (John 3:3). This new birth is a supernatural work of God that is irreversible. Unlike earthly citizenship, which can be forfeited through legal transgressions, our spiritual citizenship is secured by the perfect obedience and righteousness of Christ. As such, our faith, given by God, ensures that our place in His kingdom is eternally secure, reflecting the essence of sovereign grace theology.