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Ecumenism & Christian Unity (Index Page)

Ecumenism & Christian Unity (Index Page)

Last updated on: July 27, 2026 at 12:19 pm by Dave Armstrong

Ecumenism & Christian Unity (Index Page) 2026-07-27T12:19:07-04:00 Dave Armstrong

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AssisiConference

4th World Day of Prayer for Peace, Assisi (Italy), October 27, 2011 (photograph by Stephan Kölliker) [Wikimedia Commons / Creative Commons Attribution-Share Alike 3.0 Unported license]

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TABLE OF CONTENTS

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I. CATHOLICS AND PROTESTANTS

II. EASTERN CATHOLICISM

III. ANTI-PROTESTANTISM

IV. INTER-RELIGIOUS / INTER-FAITH DIALOGUE

V. SALVATION “OUTSIDE” THE CHURCH / RELIGIOUS LIBERTY

VI. JEWS AND JUDAISM

VII. ISLAM

VIII. ATHEISM AND CHRISTIAN RELATIONS

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I. CATHOLICS AND PROTESTANTS

John Wesley’s Ecumenical Letter to Catholics in Dublin [Facebook, 1991]

Communion and Unity: Biblical Injunctions (Brock Fowler) [Facebook, 1998]

My Respect for Protestants / Catholic Ecumenical Principles [2001; addendum: 1-8-03]

Anti-Catholics Are Catholics’ Brothers in Christ [4-18-02; reposted on 4-22-24]

C. S. Lewis’ Views on Christian Unity & Ecumenism [6-16-03]

How Catholics View Protestants [9-4-03; rev. 10-9-03 and 1-5-05; abridged on 11-14-16]

Reply to Pastor Steve Schlissel’s Reflections on “Romanism” [8-4-04]

My Conversion: Not Due to Hostility to Evangelicalism [9-9-06]
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Comments on the Question: “Are Protestants Heretics?” [2-2-07]

Prayer For Our Non-Catholic Brothers and Sisters (Especially Those Who Do Not Regard Us As Their Brothers and Sisters in Christ) [6-2-07, at Internet Archive]

Common Ground: An Exciting Ecumenical Venture (DVD and Book) I’m Privileged to Have Been Part Of [6-3-07; updated on 1-21-10, at Internet Archive]

Ecumenical Dialogue: Protestant & Catholic Soteriology (with C. Michael Patton) [7-8-07]

Reply to Michael Spencer’s “Five Questions For Roman Catholics” [9-26-07]

Fair Ecumenical Discussion & Catholic First Principles [11-29-07]

The Remarkable Joint Cooperation of Pope St. John Paul II and Campus Crusade for Christ [Facebook, 11-29-07]

Gratefulness for My Evangelical Protestant Background [3-18-08]

Catholic-Protestant Common Ground (Esp. Re Good Works) [4-8-08]

Difficulty of Catholic-Protestant Marriage: Some Thoughts [5-7-08; rev. 4-25-18]

The “Catholic-Sounding” Luther: 25 Examples [6-16-08]

Catholic-Protestant Dialogue: Recommended Books [7-2-08; abridged on 5-9-24]

What I Like About Calvinism and Calvinists [June 2009]

Dialogue: Do Vatican II & Ecumenism Discourage Converts? [Sep. 2009]

50 “Catholic” John Calvin Views [3-18-10]
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Dialogue: Definition of “Christian” (vs. Reformed Pastor) (+ Did Trent Anathematize all Protestants?) [6-5-10]

Ecumenism, Catholic Social Teaching, Doctrine, & Apologetics [8-9-12]

Martin Luther: Catholicism is Christian [6-12-13]

Catholic Approach to Protestants: Reflections [8-9-13]

Discussion on [Political Commentator] Kirsten Powers’ Evangelical Conversion, Ecumenism, Invincible Ignorance, Catholicism as the “Fullness of Faith,” Sacraments and Salvation, Etc. [Facebook, 11-3-13]

How Protestants Can be Brethren in Christ (Christians) and [Partial] Heretics at the Same Time, According to Trent [1-4-14]

Discussion: Ecumenism vs. Radical Catholic Reactionaries [1-4-14]

Defense of Vatican II and Ecumenism (Dave Armstrong and Paul Hoffer vs. Tony Jokin) [Facebook discussion thread, 12-18-14]

Dialogue with a Baptist Philosophy Professor on Catholic-Protestant Ecumenical Relations (vs. Dr. Jerry Walls) [5-13-15]

Top Ten Remarkable “Catholic” Beliefs of Martin Luther [8-13-15]

Top 15 “Catholic” Beliefs of John Calvin [8-22-15]

Defending John Calvin’s “Top 15 ‘Catholic’ Beliefs” [9-2-15]

Should Catholics Try to Persuade Protestants? [5-25-16]

Ecumenism vs. No Salvation Outside of the Church? (vs. Dustin Buck Lattimore) [8-9-17]

Defending Ecumenism and Vatican II vs. Reactionary Catholics [8-10-17]

Baptismal Ecumenism: A New Evangelistic Paradigm (Rod Bennett) [8-11-17]

John Calvin’s 15 Surprisingly Catholic Views [National Catholic Register, 10-10-17]

Socratic Dialogue / Debate vs. Anti-Lutheran Catholic [3-20-07 and 10-24-17]

On Celebrating (Or Commemorating) the “Reformation Day” 500th Anniversary [Facebook, 11-1-17]

Catholic Ecumenism + Apologetics (James Swan’s Cluelessness) [11-18-17]

Dialogue on “Mere Christianity” and “The Church” [11-22-17]

Do Protestants Hate My Writings? / Catholic-Protestant Dialogue [Facebook, 12-27-18]

Reactionary Louie Verrecchio’s Three Lies About Vatican II [6-19-19]

Vs. Pasqualucci Re Vatican II #2: Unitatis Redintegratio (Salvation) [7-11-19]

Dialogue: Pope Francis vs. Gospel Preaching & Converts? No! (vs. Eric Giunta) [1-3-20]

Reply to Questions Concerning Attending Protestant Services [Facebook, 4-1-20]

Islam Expert Sam Shamoun Has Renounced Anti-Catholicism [Facebook, 2-22-21]

Nice Protestant Compliments of My Work [Facebook, 6-8-22]

Very Nice Compliment from Protestant You Tube Apologist Collin Brooks [Facebook, 7-16-22]

“Asbury Revival”: So Far So Good, But Be Watchful [2-20-23]

Why Protestants Become Catholics (w Gavin Ortlund) [2-22-24]

My Deep Respect for Gavin Ortlund as a Protestant Apologist [2-22-24]

“Are Catholics Christians? Why Protestants Can Say YES” (video by Gavin Ortlund) [+ my commentary and many related links] [Facebook, 12-22-24]

Reply to Anglican E. B. Pusey #1 (Agreement on Ecumenism and Various Doctrines; Sola Scriptura) [1-20-25]

Are All Protestants “Saved”? (“TurretinFan” Insanity) [8-4-09; abridged with new intro. on 7-25-25]

Is the Catholic Definition of “Christian” Deceptive? (Vs. “TurretinFan”: Including Some “Reminiscing” About Past Interactions with the Major Anti-Catholic Apologists Online) [7-26-25]

Catholic Salvation: Explanation for Protestants . . . With Many Links for Further Study, and Clarification That Catholic Anathemas Against Fellow Christian Protestants Are No Longer in Force [2-25-26]

II. EASTERN CATHOLICISM

Books by Dave Armstrong: Orthodoxy and Catholicism: A Comparison (Third Edition with co-author Fr. Deacon Daniel Dozier, July 2015)

Byzantine Catholic Friend Bears Witness to My Ecumenical Outlook, with Kind Words [Facebook, 6-5-16]

III. ANTI-PROTESTANTISM

Wickedness of Christian Division & Anti-Protestantism [8-11-03 and 5-3-04]

Michael Voris’ Anti-Protestant Rhetoric [8-8-13]

Socratic Dialogue / Debate vs. Anti-Lutheran Catholic [3-20-07 and 10-24-17]

Condemnation of the Anti-Protestant Spirit (A Sad Dialogue) [10-25-17]
*

Reply to a Critic: Am I Un-Ecumenical & Anti-Protestant? [6-22-19]

Dialogue on Anti-Protestantism, Baptism, & Salvation Outside the Church [Facebook, 3-28-21]

Thoughts on Anti-Protestant Bigotry [Facebook, 1-14-23]

Interaction with and Rebuke of an Anti-Protestant Reactionary Catholic [Facebook, 6-6-26]

IV. INTER-RELIGIOUS / INTER-FAITH DIALOGUE

Ecumenical Gatherings at Assisi: A Defense: Ecumenism in St. Thomas Aquinas (Fr. Alfredo M. Morselli) [8-1-99]

Dialogue: Vatican II & Other Religions (Nostra Aetate) [8-1-99]

Defense of 2nd Ecumenical Gathering at Assisi (Mark Shea) [2-6-02]

Can a Christian Fund a Mosque? [3-25-07; abridged 8-8-16]

Does the Catholic Church Equate Allah and Yahweh (God)? [article for Seton Magazine, 18 June 2014; see additional important clarifications and vigorous discussion on my Facebook page]

Biblical Evidence for Ecumenism (“A Biblical Approach to Other Religions”) [National Catholic Register, 8-9-17]

Is VCII’s Nostra Aetate “Religiously Pluralistic” & Indifferentist? [6-7-19]

Reactionary Louie Verrecchio’s Three Lies About Vatican II [6-19-19]

David Madison vs. the Gospel of Mark #7: Ch. 7 (Gentiles) [8-19-19]

Dialogue: Pope Francis vs. Gospel Preaching & Converts? No! (vs. Eric Giunta) [1-3-20]

Pope St. Pius X: Muslims Worship “the one True God” [Facebook, 9-4-20]

Pope Francis & the Diversity of Religions (The Sedevacantist Outfit Novus Ordo Watch Lies Yet Again About Pope Francis) [11-29-20]

Ecumenism & Religious Liberty [Ch. 9 of my book, Reflections on Radical Catholic Reactionaries (December 2002; revised in November 2023] [11-21-23]

V. SALVATION “OUTSIDE” THE CHURCH / RELIGIOUS LIBERTY

The Catholic Church’s View of Non-Catholic Christians (Karl Adam) [Facebook, 1996; from 1924]

On Salvation Outside the Catholic Church (Fr. John A. Hardon, S. J.) [Facebook, 6-15-98; written in 1975]

Is There Salvation Outside the Church? (Fr. William G. Most) [Catholic Culture, 1988]

Anathemas of Trent & Excommunication: An Explanation [5-20-03, incorporating portions from 1996 and 1998; abridged on 7-30-18]

Salvation Outside the Church?: Alleged Catholic Magisterial Contradictions & St. Thomas Aquinas’ Views [7-31-03]

Dialogue w Protestant: “One True Church” vs. Ecumenism? (vs. Michael Patton) [7-11-07]

*
No Salvation Outside the Church: Reply to Pastor Bill Keller [4-23-08]
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Dialogue: Definition of “Christian” (vs. Reformed Pastor) [6-5-10]

St. Paul: Two-Faced Re Unbelief? (Romans 1 “vs.” Epistles) [7-5-10]

Is There Salvation Outside of the Church? And Other Questions. (Joe Heschmeyer, Shameless Popery, 6-4-10)
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Salvation Outside the Church (Joe Heschmeyer, Shameless Popery, 8-12-10)

Why Mathison is Wrong on Salvation Outside the Church (Joe Heschmeyer, Shameless Popery, 8-17-10)

Various Thoughts on Salvation “Outside” the Church [2012]

“Separated Brethren” Term Before Vatican II (1962-1965) [3-25-13]

Total Depravity and Salvation Outside the Church (vs. a Calvinist) [4-4-17]
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Ecumenism vs. No Salvation Outside of the Church? (vs. Dustin Buck Lattimore) [8-9-17]

“No Salvation Outside the Catholic Church” in a Nutshell [Facebook, 1-26-18]
*

Reactionary Louie Verrecchio’s Three Lies About Vatican II [6-19-19]

Vs. Pasqualucci Re Vatican II #2: Unitatis Redintegratio (Salvation) [7-11-19]

Vs. Pasqualucci Re Vatican II #9: Dignitatis Humanae & Religious Liberty [7-18-19]

Seidensticker Folly #64: A Saved Dahmer & Damned Anne Frank? [11-24-20]

Pope Francis & the Diversity of Religions (The Sedevacantist Outfit Novus Ordo Watch Lies Yet Again About Pope Francis) [11-29-20]

Dialogue on Anti-Protestantism, Baptism, & Salvation Outside the Church [Facebook, 3-28-21]

Jesus vs. James White on Who Can be Saved [10-12-21]

Vs. J. Oliveira #9: Salvation & the Church [10-5-23]

Catholicism & Non-Catholic Salvation (Vs. Gavin Ortlund) + How Early Protestants Widely Damned Other Protestants Who Held Different Theological Views [2-9-24]

VI. JEWS AND JUDAISM

[See: Jews, Judaism, and the Old Testament Page]

VII. ISLAM

Can a Christian Fund a Mosque? [3-25-07; abridged 8-8-16]

Does the Catholic Church Equate Allah and Yahweh (God)? [article for Seton Magazine, 18 June 2014; see additional important clarifications and vigorous discussion on my Facebook page]

John Paul II Kissing the Koran: Dialogue with Traditionalists [2012; new Introduction added on 6-4-19] [6-4-19]

Pope St. Pius X: Muslims Worship “the one True God” [Facebook, 9-4-20]

VIII. ATHEISM AND CHRISTIAN RELATIONS

Secular Humanism & Christianity: Seeking Common Ground (with Sue Strandberg) [5-25-01]

Can Atheists be Saved? Are They All “Evil”? [2-17-03]

Constructive, Enjoyable Atheist-Christian Discussion Perfectly Possible [1-4-07]

16 Atheists and Me: Further Adventures at an Atheist “Bible Study” Group [11-24-10]

My Enjoyable Dinner with Six Atheist Friends [6-9-15]

Clarifications Regarding Atheist “Reductio” Paper [8-20-15]

Legitimate Atheist Anger [10-7-15]

New Testament on God-Rejecters vs. Open-Minded Agnostics [10-9-15]

Dialogue with a Friendly Atheist #1: My Pagan / Occultic Period (+ Circumstances and Factors Regarding my Evangelical Conversion in 1977 at Age 18 and Catholic Conversion at Age 32) [8-3-17]
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Dialogue with a Friendly Atheist #2: Music, Longing, & Mysticism (+ Part Two / #3) [8-7-17 and 8-14-17]

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Practical Matters: This is the most comprehensive and multi-faceted Catholic apologetics blog: rated #1 for Christian sites by leading AI tool, ChatGPT. I offer more than 5,000 free online articles, fifty-nine books, and many scores of videos at the Catholic Bible Highlights YouTube channel (please subscribe!). If you believe my full-time apostolate is worth supporting, please seriously consider financially supporting it. PayPal donations are the easiest: just send to my email address: [email protected]. You’ll see the term “Dave Armstrong Bookstore”. To learn about the different methods of contributing (including Zelle and 100% tax-deductible donations if desired), see my page: About Catholic Apologist Dave Armstrong / Donation Information. Thanks a million!

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Last updated on 6 June 2026

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