Core response
Jude tells believers to defend the faith already delivered to them. Verse 4 names the danger. Intruders turn grace into license and deny the Lord. Jude gives a standard for testing a later claim. A rule ending all public revelation would require further evidence.
Compare the arguments
What was delivered once for all?
Jude tells his readers to contend for the faith that was delivered to the saints. The Greek hapax modifies “delivered.” The faith has already been entrusted to them and remains the standard they are to defend. In verse 4, people have slipped into the community, turned grace into an excuse for immorality, and denied Jesus Christ. In verses 17–21, Jude tells the readers to remember the apostles’ words and build on the faith they received. Jude 3–4, 17–21 · Greek text, Jude 3–4
“Once for all” carries real weight. Jude expects loyalty to a message already given. The sentence names that message as the faith. It gives no list of sacred books or date when God would stop giving scripture. Jude himself writes a letter to defend the faith that had already been delivered. Giving the faith and writing a further witness to it are two different acts. Jude 3–4
Why do Christians infer that public revelation ended?
In his dialogue with Latter-day Saint scholar Robert L. Millet, Catholic apologist Jimmy Akin reads Jude 3 with Hebrews 1 and Catholic Tradition. He argues that Christ is the fullness of revelation and that God has chosen to give no new public revelation. The Catholic Catechism still allows a role for private revelations that help people live the faith. Akin’s argument concerns the limits of public revelation, a different question from whether the Bible is the only binding authority. Akin and Millet · Catechism §§65–67
How does that view shape the Catholic response to Moroni’s invitation to pray?
Protestant writers make several versions of the objection. Connie W. Adams argues that a faith delivered once for all rules out any latter-day revelation. The Institute for Religious Research also appeals to Christ’s completed saving work and the unique authority of the apostles. Bill McKeever asks whether specific LDS teachings about God and salvation belong to the faith Jude defended. His challenge calls for comparison of particular doctrines. A claim that God would never authorize another written witness calls for a further argument about revelation itself. Adams, Truth Magazine, pp. 3–4 · Institute for Religious Research · McKeever, Mormonism Research Ministry
How can Latter-day Saints affirm a faith given once?
I believe Jesus Christ’s saving work is final. Hebrews says He was offered once to bear sins. A new witness has no second atonement to offer. The ninth Article of Faith affirms that God continues to reveal truth. Latter-day Saints claim that Christ restored authority and gave additional scripture that points to the same Savior. Whether He did so calls for its own evidence. Hebrews 9:24–28 · Articles of Faith 8–9 · Jeffrey R. Holland on continuing revelation
Here is one comparison to make. Paul tells the Corinthians that Christ died for our sins and rose again. In 3 Nephi, Jesus describes His gospel in terms of His mission from the Father, His death on the cross, and His power to draw and judge humanity. Both texts put Christ’s saving work at the center. That agreement answers a claim that the Book of Mormon replaces Christ’s saving work. It leaves specific disagreements about God, grace, and ordinances to be tested on their own passages. 1 Corinthians 15:1–8 · 3 Nephi 27:13–21
What question should you ask next?
“I agree that anything claiming to be revelation has to be faithful to Christ. Is your claim that Jude rules out any later scripture, or that a particular Restoration teaching contradicts the apostolic faith? If it’s the second, let’s read the two teachings side by side.” Compare Jude with Paul’s warning about a different gospel · Read the separate objection from Revelation 22