What is the significance of the new birth according to the sermon?

According to John 3:3, Jesus emphasizes the necessity of being born again to see the kingdom of God. The new birth signifies a spiritual regeneration where God changes a person's heart, enabling them to recognize their need for Him and truly believe in the Gospel. This profound transformation is not something we can achieve on our own; it is purely an act of God’s sovereign grace. As the sermon articulated, the thief on the cross experienced this in his final moments—he could do nothing for himself yet was saved solely by grace through faith. Such a change is imperative, as flesh cannot inherit the kingdom of God, highlighting the need for spiritual renewal to enter paradise.