What does the eternal covenant of grace mean for believers?

The eternal covenant of grace is essential to understanding the foundational tenets of Reformed theology. It signifies the commitment between the Father and the Son where the Father elects a people to be saved, and the Son agrees to fulfill all requirements for their redemption. In Psalm 21, this covenant is expressed in God's unwavering promise to secure the salvation of His people. For believers, this covenant offers both assurance and rest, knowing that their salvation is not dependent on their efforts but on God's faithful and unchanging character. This theological truth provides comfort that, despite circumstances, those whom God has chosen will undoubtedly be saved.