Why is regeneration necessary for salvation?

Regeneration, or being born again, is crucial for salvation as it is the work of the Holy Spirit that imparts new life to a spiritually dead individual. Jesus states in John 3:3 that unless a man is born again, he cannot see the kingdom of God. This illustrates that human effort is insufficient for understanding or entering God's kingdom. Regeneration allows an individual to acknowledge their need for Christ and to respond in faith. In Ezekiel 36:26, God promises to give His people a new heart and a new spirit, enabling them to follow His ways and experience true transformation.