The Compare Center

Side by side

Choose any two branches of historic Christianity and read their confession, doctrine by doctrine, in their own voice.

vs

Authority

Catholic

Scripture, Tradition, and the Magisterium together.

Eastern Orthodox

Scripture and Holy Tradition; conciliar consensus.

Scripture

Catholic

73 books including Deuterocanon; Vulgate tradition.

Eastern Orthodox

Old Testament follows the Septuagint; broader canon.

Tradition

Catholic

Sacred Tradition, equal in dignity to Scripture.

Eastern Orthodox

Holy Tradition as the life of the Spirit in the Church; Scripture is part of it.

Baptism

Catholic

Regenerative; usually by infusion in infancy.

Eastern Orthodox

Regenerative; triple immersion, with chrismation and Eucharist.

Eucharist

Catholic

Transubstantiation; real presence under the species.

Eastern Orthodox

True Body and Blood; mystery without scholastic definition.

Salvation

Catholic

Grace, faith working through love; sacramental life.

Eastern Orthodox

Theosis through participation in divine life.

Mary

Catholic

Theotokos; Immaculate Conception (1854); Assumption (1950).

Eastern Orthodox

Theotokos; ever-virgin; honored above all saints; rejects Immaculate Conception as defined.

Saints

Catholic

Veneration and intercession; formal canonization.

Eastern Orthodox

Veneration and intercession; glorification by the Church.

Church Structure

Catholic

Episcopal, with universal jurisdiction of the pope.

Eastern Orthodox

Episcopal, conciliar; primacy of honor for Constantinople.

Apostolic Succession

Catholic

Bishops in unbroken succession from the apostles.

Eastern Orthodox

Bishops in unbroken succession; tied to right faith and communion.

Eschatology

Catholic

Particular judgment, purgatory, general resurrection, final judgment.

Eastern Orthodox

Toll-houses (debated), prayer for the dead, general resurrection, final judgment.

Filioque

Catholic

The Spirit proceeds from the Father and the Son (Filioque) as from one principle.

Eastern Orthodox

The Spirit proceeds from the Father alone; the Filioque addition is rejected as an unauthorized change to the Creed.

Icons & Images

Catholic

Sacred images and statues honored; veneration distinguished from worship.

Eastern Orthodox

Icons as windows on heaven; veneration defined at Nicaea II (787); no three-dimensional statuary.

Original Sin

Catholic

A deprivation of original holiness transmitted to all Adam's descendants — contracted, not personally committed (CCC 404–405). It brings concupiscence and the loss of grace, and is remitted by baptism; the Augustinian language of 'guilt' refers to this fallen state, not to personal culpability for Adam's act.

Eastern Orthodox

Inherited mortality and the wound of sin, not inherited guilt; the fall is a shared condition healed in Christ.

Marriage & Divorce

Catholic

Sacramental and indissoluble; annulment recognizes that a valid marriage never existed.

Eastern Orthodox

A mystery of the Church; remarriage after divorce is permitted under strict pastoral economia.

Christology

Catholic

Chalcedonian: one Person in two natures, divine and human, without confusion, change, division, or separation.

Eastern Orthodox

Chalcedonian in a Cyrillian key; two natures fully united in the one hypostasis of the Word.

For fuller treatments, see the Catholic Church, Eastern Orthodox Church, Protestant Christianity, Oriental Orthodox Communion pages.