How do we know the sure mercies of David are true?

The sure mercies of David are assured by the historical evidence of God's faithfulness throughout Scripture. In Acts 13:34, Paul connects the resurrection of Jesus with these mercies, emphasizing that the promises made to David find their ultimate fulfillment in Christ. God is depicted as a covenant-keeping God, whose integrity ensures that what He has promised will come to pass. The resurrection of Jesus serves as the quintessential proof that God's gracious promises are not only reliable but transformative, securing eternal life for His people. Furthermore, God's invitation to come and hear—the proclamation of the Gospel—is instrumental in revealing these truths to believers, who are called to trust in His Word and His character.