How do we know regeneration is a supernatural act?

Scripture clearly teaches that regeneration is not a mere ceremony or human decision; it is a miraculous work of the Holy Spirit. In John 3:3-8, Jesus explains that one must be born again to see the kingdom of God, reinforcing the notion that this birth is as essential and supernatural as the physical birth. No external act like baptism can effectuate this regeneration, as it is solely the work of the Spirit upon the hearts of the elect. Such an inward transformation manifests itself in genuine faith, repentance, and a pursuit of holiness, which reveals the clear distinction between true believers and those who are simply partaking in religious rituals without the inward change.