What does 'regeneration' mean in Christian theology?

In the Reformed understanding, regeneration is the act of the Holy Spirit awakening a person’s heart to receive Christ, thus enabling one to believe and be saved. It is grounded in God's covenant of regeneration, as referenced in the sermon, where we see the work of the Father, Son, and Spirit come together for the salvation of the chosen. This is not merely a moral improvement but a complete transformation symbolized by the new birth, ensuring that every true believer will persevere in faith until the end. The work of regeneration forms the foundation of a believer's relationship with God, empowering them to walk in obedience and faithfulness.