Why is it important for Christians to be born again?

The new birth is critical in Reformed theology as it represents the sovereign act of God whereby a person is regenerated by the Holy Spirit. As explained in John 3:3, Jesus emphasizes that unless a person is born again, they cannot perceive the kingdom of God. This signifies that inherent sinful nature, inherited from Adam, renders individuals spiritually dead and incapable of achieving salvation on their own. The new birth not only grants the ability to understand and believe the Gospel but also produces a desire for God's Word, fostering spiritual growth and intimacy with Him.