Karl Rahner – “The Trinity” (Key Vocabulary)

Bibliographical / Publication Context

• Original German edition: Benziger Verlag, Einsiedeln, 1967
• English translation by Joseph Donceel, first GB edition 1970; ISBN 0-86012-015-5
• Author: Karl Rahner S.J. – prominent 20th-century Catholic theologian
• Work conceived as a short, systematic companion to Rahner’s larger essays on biblical/dogmatic development of Trinitarian doctrine (especially in “Mysterium Salutis” & “Theological Investigations IV”).

Macro-Structure of the Treatise (as printed)

• Preliminary NOTE (methodological positioning)
• I The Method and Structure of the Treatise “On the Triune God”
• II The Main Lines of Official Trinitarian Doctrine
• III A Systematic Outline of Trinitarian Theology
• Extensive bibliography, indices & later promotional pages follow

Preliminary NOTE (pp. 8)

• Presupposes earlier historical/biblical studies (listed in Mysterium Salutis II)
• Three-step programme:
  1. Explain method & isolation of Trinity treatise
  2. Resume official (magisterial) doctrine
  3. Offer a synthetic, systematic outline
• Admits inevitable repetition because identical questions recur “against a variety of horizons”.

I METHOD & STRUCTURE OF THE TREATISE “ON THE TRIUNE GOD”

A. Isolation of Trinitarian Doctrine in Piety & Textbooks (pp. 10-14)

• Modern Christians live “practically as monotheists” although they confess the Trinity.
• If the dogma were retracted, most devotional literature would remain unchanged.
• Incarnation often reduced to the bare fact that “God (one person) became man,” without specifying that the Logos became man.
• Liturgical & catechetical habits (e.g.
  • “Our Father” addressed interchangeably to Trinity or persons,
  • Eucharist offered “indifferently” to three persons,
  • Satisfaction/Redemption theories that treat the God-man abstractly) reinforce this a-trinitarian climate.
• Grace, sacraments, eschatology usually expounded in monotheistic categories (created habits, efficient causality) rather than as participation in tri-personal life.
• Classical vestigia Trinitatis in creation largely ignored today.

B. Split between Treatise De Deo Uno and De Deo Trino (pp. 15-18)

• Historically the split appears after Lombard’s Sentences; crystallised in Thomas’s Summa.
• Greek pattern: begin with the Father (ὁ Θεός) → unity already personal; Western pattern: begin with “one common essence” → risk of a static, a-historical monotheism.
• Consequence: Trinity section feels like an appendix, unrelated to soteriology.

C. Axiomatic Unity of “Economic” and “Immanent” Trinity (p. 21-24)

• Rahner’s celebrated axiom:
  $\text{Economic Trinity} = \text{Immanent Trinity}$
  $\text{Immanent Trinity} = \text{Economic Trinity}$
• Justified if doctrine can:
  1. Stay faithful to magisterial data
  2. Integrate biblical salvation-history
  3. Show Trinity present in faith/life

D. Incarnation as Paradigm (pp. 24-34)

• Hypostatic union = proper to the Logos; proves at least one non-appropriated person-world relation.
• Counters P. Galtier’s view that only “hypostatic unions” differentiate persons ad extra.
• Refutes thesis that any divine person could have become man: Logos’ “word-character” uniquely suits incarnation.
• Human nature of Christ not a detachable mask; it is constitutive symbol (§D 3).

E. God’s Threefold Relation in Grace (pp. 34-38)

• “Indwelling” ≠ mere appropriation: each person communicates himself.
• Uncreated grace = tri-personal gift; created grace = effect/consequence.

F. Methodological Consequences (pp. 38-45)

• Trinity must be accessed via missions; doctrine of “missions” cannot be a closing scholion.
• History of revelation can legitimately guide systematic order.

G. New Relation between De Deo Uno / De Deo Trino (p. 45-46)

• Treatise on “one God” should already presuppose Fatherhood; cannot be purely metaphysical.

H. Mystery (pp. 46-49)

• Trinity is absolute mystery – not mere conceptual puzzle; identical with mystery of self-communication.

II MAIN LINES OF OFFICIAL TRINITARIAN DOCTRINE (pp. 49-79)

A. Trinity as Absolute Mystery (Vatican I DS 3015-16, 3225)

• Cannot be penetrated even after revelation.

B. Meaning & Limits of Key Terms

• Two fundamental terms assumed intelligible:
  • "Substance / Essence / Nature" (one Godhead)
  • "Person / Subsistence / Hypostasis" (threefold distinctness)
• In magisterium these terms function primarily as logical safeguards (anti-tritheist, anti-modalist), not ontic explanations.

C. Dogmatic Summary

• Father: unoriginate source; $a\;nullo\;originem\;sumsit$.
• Son/Logos: $consubstantialis\;Patri$, “begotten not made,” Word-Wisdom imagery, unique incarnation.
• Spirit: $procedit\;a\;Patre\;Filioque$ or $a\;Patre\;per\;Filium$; not begotten; ‘Gift-Love.’
• Relative opposition only distinction; essence remains one (Florence DS 1330):
  $In\;Deo\;omnia\;sunt\;unum,\;ubi\;non\;obviat\;relationis\;oppositio.$
• Four notional acts: active & passive generation; active & passive spiration.

D. Immediate Theological Corollaries

• All opera ad extra are common; distinct persons appear only through missions (appropriations excepted).
• Created grace and hypostatic union are "effects" but presuppose proper person-world relations.

III SYSTEMATIC OUTLINE OF TRINITARIAN THEOLOGY (pp. 80-120)

A. Purpose (p. 80)

• Provide condensed synthesis; consciously selective – omits scholastic subtleties judged kerygmatically sterile.

B. Developing the Starting Point (pp. 81-92)

• Four dual aspects of self-communication:
  1. Origin ⇄ Future
  2. History ⇄ Transcendence
  3. Offer ⇄ Acceptance (freedom!)
  4. Truth (knowledge) ⇄ Love (will)
• Two irreducible but inter-ordered basic modalities emerge:
  • Revealing-truth-history (= Son/Word)
  • Enabling-love-spirit (= Holy Spirit)

C. Transition Economic → Immanent (p. 98-100)

• If modalities are real in salvation-history they must be real in God.
• Self-communication requires intra-divine difference lest it collapse into mere creation.

D. Grounding: Statements in Immanent Frame (pp. 100-103)

• Father = unoriginate self-communicator.
• Son = the self-expression/truth of the Father.
• Spirit = the self-acceptance/love of Father & Son.
• Distinction “constituted by a double self-communication.” Relations purely relative, yet absolutely real via identity with essence.

E. Concept of Person Revisited (pp. 103-109)

• Modern connotation (independent centre of consciousness) misleads.
• Rahner proposes explanatory phrase: “three distinct manners of subsisting.”
• Advantages:
  • Stresses unity (same God subsists thrice)
  • Avoids tri-theistic image of 3 psychés
  • Compatible with Greek ὑπόστασις and Thomistic subsistens distinctum in natura rationali.
• Key declaratives using the phrase:
  • "The one God subsists in three distinct manners of subsisting."
  • "Each manner is related oppositionally to the others without multiplying essence."

F. Classical Psychological Analogy (pp. 115-120)

• Legitimate to correlate
  $\text{Generation} \leftrightarrow \text{Knowledge}$
  $\text{Spiration} \leftrightarrow \text{Love}$
• Yet remains hypothetical, carries circular risks:
  • Projects creaturely cognitive structure onto God.
  • Must be kept subordinate to economic starting point.

G. Concluding Methodological Insights (p. 120)

• Authentic Trinitarian theology must be simultaneously:
  1. Biblical-historical (missions)
  2. Dogmatically faithful (relations/processions)
  3. Existential-soteriological (grace & Christology)
• Christology and Pneumatology are effectively “chapters” of Trinitarian dogma.

Key Technical Terms & Formulae

• $Processio$ / $Missio$ – inner vs. historical emergence.
• $Filioque$ – Western clarification "from the Father and the Son" (Council of Florence).
• $Hypostasis$ – concrete subsistence; $Persona$ denotes "distinct subject in rational nature."
• $Appropriatio$ – attributing common external work preferentially to one person.
• $Vestigia\;Trinitatis$ – traces/images of Trinity in creation & soul (Augustine).
• $Gratia\;increata$ – the uncreated tri-personal self-gift; $gratia\;creata$ – habitual effect.

Ethical / Pastoral Implications Highlighted by Rahner

• Liturgical language should respect personal missions (e.g. praying to the Father, through the Son, in the Spirit).
• Catechesis must expose faithful to concrete trinitarian experience (incarnation, grace, prayer).
• Grace framed as “participation in triune life” combats functional monotheism.
• Theology must resist isolating dogmatic loci; every doctrine (creation, redemption, eschatology) is implicitly trinitarian.