How do we know the importance of being born again?

The concept of being 'born again' is foundational for Christians, as Jesus Himself states in John 3:3, 'Except a man be born again, he cannot see the kingdom of God.' This spiritual rebirth is not merely a change of behavior or an adherence to religious duties, but a profound transformation by the Holy Spirit that produces new life and identity in Christ. Without this divine work, all external religious expressions, such as church attendance or sacraments, are rendered futile and fruitless.

Historically, Reformed theology emphasizes the necessity of this new birth while affirming that it is an act of God’s grace. This transformation is not something we can achieve on our own; it is entirely the work of God in our hearts. As believers, we are called to reflect on whether we have truly experienced this change. The true nature of our Christian life hinges upon this question: Do we have Christ in us? The importance lies in acknowledging that outward appearances can be deceptive, and without genuine conversion, we face the eternal consequences of a faith that lacks substance.