Ecumenism

Oversimplified

• The modern movement toward unity among all Christian bodies (and sometimes all religions) on the basis of shared "core" beliefs.
• Orthodoxy welcomes the desire for unity but rejects ecumenism's premise — that the one visible Church does not already exist.

Summary

Ecumenism seeks to reunite divided Christians (and, in its broader forms, the world's religions) by identifying a common core beneath their differences. Orthodoxy cannot accept it on those terms, because it already confesses itself to be the one Church of the Creed — not a fragment seeking reunion but the fullness from which others have departed. Fr. Seraphim Rose called the underlying idea — that there is no one visible Church — "the chief heresy of the 20th century."[^1] Cross-link The Church, Invisible vs Visible Church, Schism.

The "core agreements" argument

"So long as we agree on the core principles of Scripture — or trace our roots to the Apostles' Creed — we are all one." The claim refutes itself, because what counts as core is exactly what is in dispute. Name the doctrines Orthodoxy holds as primary — the Eucharist as the true Body and Blood, the visible Church, baptismal regeneration — and the speaker who proposes "core unity" already denies several of them. His own list of essentials quietly excludes the things the Church calls essential. A denial of a portion of the faith is a denial of the whole, for the faith is not a pile of separable propositions but a single seamless garment. Cross-link Sola Scriptura, Eucharist, Dogma.

The deeper danger: a Spirit without the Son

The broadest ecumenism reaches past Christianity to make the Holy Spirit the "common denominator" of all religions — invoking "I will pour out my Spirit on all flesh" (Joel 2.28) to claim the Spirit works in the non-Christian religions independently of Christ and His Church. Fr. Seraphim Rose identifies this as a direct assault on the Trinity: "Why, indeed, should Christ have established a Church if the Holy Spirit acts quite independently... of Christ Himself?"[^2] A Spirit severed from the Son is not the Holy Spirit of the Creed but an idol of the coming universal religion. Cross-link The Trinity, Holy Spirit.

[^1]: Fr. Seraphim Rose, Orthodoxy and the Religion of the Future — "the chief heresy of the 20th century." [^2]: Fr. Seraphim Rose, Orthodoxy and the Religion of the Future, on ecumenism's assault on the Trinity.