How do we know the doctrine of new creation is true?

The truth of the doctrine of new creation is grounded in the transformative power of Christ’s work in the lives of believers. As stated in 2 Corinthians 5:17, 'If any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new.' This underscores the radical change that occurs spiritually when one trusts in Jesus for salvation. The Old Testament also foreshadows this transformation with promises of new heavens and a new earth, as highlighted in Isaiah 66:22. The relationship between God and believers is fundamentally altered as they are birthed anew by the Spirit, receiving a new identity that reflects God's character. Thus, this doctrine is not merely theoretical but experienced by those who have faith in Christ.