How do we know that God provides us with a new heart?

God's promise of a new heart is found in Ezekiel 36:26, where He declares, 'I will give you a new heart and put a new spirit in you.' This promise is fulfilled in believers through the work of the Holy Spirit in the new birth. By faith in Christ, we receive a heart of flesh that is sensitive to God's law and filled with His love, enabling us to follow Him in obedience. This transformation is essential for salvation and emphasizes the grace of God in changing our hearts from stone to flesh.