How do we know that regeneration is a sovereign act of God?

Jesus teaches Nicodemus that the new birth is a sovereign act of God. He illustrates this by comparing it to the wind, which moves without human control. Just as we cannot predict the wind's path, we cannot control how God regenerates individuals. This underscores the Reformed understanding that salvation is entirely initiated and accomplished by God, leaving human beings entirely passive in the process of their spiritual birth (John 3:8). This doctrine reveals God's sovereignty in salvation, emphasizing that it is He alone who grants new life to the spiritually dead.