Clay Curtis expounds Isaiah 58 to demonstrate that Christ is the true Sabbath rest prefigured in Old Testament observance, establishing rest not through human works but through faith in Christ's completed redemption. Curtis argues that Israel's fundamental sin was not moral transgression but superficial, works-based religion—fasting, self-affliction, and religious performance without genuine faith in God, which parallels the error of seeking justification through law-keeping rather than Christ. He grounds his exposition in Colossians 2:14-20, where Paul declares that Christ has fulfilled all ceremonial ordinances (typified by the Sabbath), making the "shadow" obsolete through the arrival of the "body." Curtis emphasizes that true Sabbath rest—cessation from one's own works—occurs when believers rest entirely in Christ's satisfaction of the law and God's imputation of His righteousness, a rest that extends eternally rather than merely weekly. The sermon's practical significance lies in its Reformed emphasis on the antithesis between works-righteousness and faith-righteousness, warning against the perpetual human tendency to supplement or replace gospel grace with human effort, whether in personal piety or in the church's evangelistic methods. Curtis concludes that Christian works—including generosity and gospel proclamation—flow as grateful responses to received grace rather than as conditions for obtaining God's favor, making true Christian service fundamentally different from self-righteous religious performance.
“All the law, all the ordinances, Christ came and fulfilled for His people. And the one ordinance that we preach is the gospel of Christ declaring He is the righteousness and holiness of His people.”
“Christ is our rest. He fulfilled the law, and so the Lord's people rest in him. That's what the Sabbath day pictured. Come unto me, all you that labor and are heavy laden for trying to work your way to God. Come to me, I will give you rest.”
“When God gives you faith in Christ, you see you've never done one thing pleasing in yourself. You see your sin. And you know you have to have Christ for all. And that's where you find your rest, in Him.”
“This is all the grace of God toward us, because all of this is what Christ did for us, every bit of it... you believe Christ and in gratitude to him, you want others to know him. You want to speak of him.”
The Sabbath is fulfilled in Christ, who offers true rest for believers.
Isaiah 58:1-14, Matthew 11:28
Christ is our true rest as He fulfilled the law and offers salvation to sinners.
Colossians 2:16-17, Hebrews 4:9-10
Faith in Christ is essential as He alone fulfills the law and grants us righteousness.
Romans 3:22, Hebrews 11:6
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