God's covenant is reliable because it is rooted in His immutable nature and fulfilled through Jesus Christ's obedience and sacrifice.
The reliability of God's covenant is grounded in the nature of God Himself—faithful and unchanging. In 2 Samuel 9, David’s desire to show kindness to Jonathan’s descendants is a testament to the eternal nature of God’s promises. This typifies the covenant made by God the Father and God the Son, where the promised blessings flow not based on our actions but purely on God's love and faithfulness. As noted in Romans 8:28-30, God fulfills His purposes and guarantees the salvation of those He has chosen, providing further assurance of His covenant reliability through the atoning work of Christ.
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