How does the New Covenant change a believer's heart?

Through the New Covenant, God promises to write His laws in the hearts of His people, transforming their desires and inclinations. This internal change signifies that believers are not merely external rule-keepers but are transformed from within. The Spirit enables believers to understand and embrace the grace they've received, instilling a desire to live in accordance with God's will motivated by love rather than obligation. As a result, believers are empowered to fulfill Christ's commandments, reflecting His character and love in their daily lives.