Once again JohnDiacos and Mark Gilbert discuss some of the differences between EasternOrthodoxy and Roman Catholicism.

What do RomanCatholicism, Eastern Orthodoxy, and Protestant Christianity really teach aboutsin, salvation, and assurance of heaven?

In this in‑depth theological conversation, we explorethe core differences between Catholic, Orthodox, and Protestant beliefs—goingfar beyond surface‑levelcomparisons.

Topics include:

• How eachtradition understands sin

• Why Jesus diedaccording to Catholicism, Orthodoxy, and Protestantism

• The question ofassurance of salvation—can you know you’re saved?

• The Catholicand Orthodox views of grace, sacraments, and good works

• Original sin,baptism, merit, and purgatory

• The Orthodoxconcept of theosis (deification)

• Why neitherRoman Catholicism nor Orthodoxy offers certainty of salvation

• The role ofMary in Catholic and Orthodox theology

• Mariandoctrines such as the Immaculate Conception, Assumption/Dormition, and Marianmediation

• How elevatingMary reshapes views of Jesus’ humanity

• Why ProtestantChristianity insists on justification by grace alone through faith alone

This discussionultimately centres on one critical question:

👉 Can a Christian have assurance of salvation—and if so, on whatbasis?

If you’reconsidering converting to Catholicism or Orthodoxy, or you’re seeking clarityabout historical Christian doctrines, this video will challenge assumptions,compare claims carefully, and point back to Scripture and the gospel of JesusChrist.

📖 “Why would you give up the certainty of salvation?”

🔔 If you found this helpful, please LIKE, SUBSCRIBE, and sharewith a friend.

▶️YouTube

https://www.youtube.com/@UCXncj2zJGADfgI10cJ0c9GQ

 Find part 1 athttps://youtu.be/OLlYXnDWVAw

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 00:00 Orthodoxyvs Catholicism vs Protestantism — The SIN Question That Changes Everything

02:13 “Sin Isn’tBetween Me and God”? Catholic vs Orthodox Framing

02:34 Why DidJesus Die in Orthodoxy?

04:11 ChristusVictor vs Orthodoxy — Why “Death Defeated” Still Isn’t Assurance

04:58 “NoAssurance” in Orthodoxy — “You’re on Your Own”

05:02 The OneQuestion: “If You Died Tonight… Would You Enter Heaven?”

07:57 Catholic“Macula” (Stain of Sin) + Immaculate Conception (What It Means

11:18 PurgatoryExplained — Temporal Punishment + “Cooperating With Grace”

13:38 Orthodoxy:No Original Sin — “Grace Through the Church” + Spiritual Progress

15:04 Orthodox“Toll Houses” — The Purgatory-Like Afterlife Test (Demons & Worthiness)

16:43 CatholicMary: Early Elevation → Ephesus “Mother of God” (Theotokos)

21:45 MarianDogmas: Immaculate Conception + Assumption (Why They Matter)

25:19 GregoryPalamas & Orthodoxy’s Mary — Monastic Ideal + Theosis (Deification)

27:45 “Mary’sPlan of Salvation”? Influence Over God + Co‑Redemptor Logic

32:00 ReformationCore: Jesus Fully God/Fully Man + Justification = Assurance

33:31 TheConversion Challenge: “Are You Willing to Give Up Assurance?”

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🎓 Free Training Course – Evangelising Eastern Orthodoxy

https://eeo.net.au/

📘 Certainty for Life: An Invitation for those in EasternOrthodoxy

https://certaintyforlife.com/

🔔 If this video raised questionsfor you about Roman Catholicism or talking with Catholic friends about Jesus,check out Mark's published resources, including "Stepping Out inFaith", a collection of 11 stories from former Catholics.https://matthiasmedia.com.au/search?type=product&q=mark+gilbert

 📖 Want to learn more about engaging conversations with Catholicsand Mark's Ministry with C4E?Visit:https://encministries.org.au/ministry/ministry-to-roman-catholics/