What is the covenant of grace mentioned in relation to Christ's suretyship?

The covenant of grace is a central theological concept that denotes God's eternal promise to redeem His chosen people through Jesus Christ. This covenant underscores that, before the foundations of the world, the Father, Son, and Holy Spirit agreed on a redemptive plan whereby Christ would fulfill every requirement necessary for salvation. This ensures that all who are elected will be secured by Christ as their surety, demonstrating God's unwavering commitment to their salvation. As believers, understanding this covenant helps illuminate the grace, faithfulness, and love that God imparts to His children.