God's covenant is affirmed through His eternal purpose and the fulfillment of His promises in Christ.
The certainty of God's covenant is rooted in His eternal purpose as revealed in Scripture. For example, Ephesians 1 tells us that we are predestinated according to God's purpose, indicating that God has a predetermined plan for His elect. Furthermore, Romans 3:24 explains that we are 'justified freely by His grace through the redemption that is in Christ Jesus,' ensuring that the grounds for justification are secured in Christ's sacrificial work. The fulfillment of God's promises throughout history, including redemption in Christ (John 4:34, John 17:4), demonstrates His unwavering faithfulness to His covenant.
Scripture References:
Ephesians 1:4-5, Romans 3:24, John 4:34, John 17:4
Commentary