Union with Christ in the Eucharist Theology
Christian traditions sharply disagree over how believers are united with Christ in the Eucharist, with the debate centering on whether Christ's body and blood are physically present, spiritually received, or symbolically remembered.
Catholic Transubstantiation
The Catholic tradition teaches that the bread and wine become the actual body and blood of Christ through transubstantiation. Aquinas argues that "in the above words is there any created power for causing the transubstantiation," affirming that the consecration effects a real change in substance [2]. This position holds that Christ is physically present under the appearances of bread and wine, making the Eucharist the literal body given for us. The union achieved is therefore corporeal—believers consume Christ's flesh and blood, uniting with him materially as well as spiritually.
Protestant Rejection and Alternatives
The Anglican Articles explicitly reject this view: "Transubstantiation (or the change of the substance of Bread and Wine) in the Supper of the Lord, cannot be proved by holy Writ; but is repugnant to the plain words of Scripture, overthroweth the nature of a Sacrament" [4]. Reformed theology, represented by Calvin, maintains that believers receive Christ spiritually through faith, not physically through the elements. Charles Hodge describes this union as "mystical, supernatural, representative, and vital," comparing it to branches in a vine (John 15:1-12) and members in a body [5]. For Calvin, the sacrament seals and confirms a union already established by faith, rather than creating a new physical union through consumption [3].
The Nature of Sacramental Union
One historical theory, impanation, proposed that Christ's body coexists with the bread without replacing it [3], attempting a middle position. The disagreement turns on whether "This is my body" (Matthew 26:26) [1] demands physical presence or permits figurative interpretation.
Shared Ground
All traditions agree that the Eucharist involves genuine communion with Christ and that it is not merely a human memorial. The dispute concerns the mode of presence and the mechanism of union—whether Christ comes to the believer through transformed elements, through faith's spiritual reception, or through covenantal remembrance. These differences reflect deeper commitments about sacramental causality, the relationship between sign and reality, and the nature of Christ's post-resurrection body.
Sources
- CCEL (Reformed (Old Princeton)) “Charles Hodge, Systematic Theology, Vol. 3, section 98: 16:16 16:17 16:19 16:19 16:27 17:11 18:3 18:17 18:18 18:19 18:25 19:1-30 19:3-9 19:3-9 19:4-9 19:5 19:9 19:10 19:10 19:11 19:11 19:28 20:28 22:37 22:38 23:39 24:1-25:46 24:3 24:6 24:6 24:14 24:14 24:14 24:24 24:29-35 24:30 24:30 24:31 24:31 24:34 24:34 24:36 25:31 25:31 25:31-46 25:31-46 25:31-46 25:31-46 25:32 25:32 25:41 25:46 26:26 26:26-28 26:27 26:63 26:64 27:24 27:43 28:19 28:19 28:19 28:19 28:19 28:19 28:20 28:20 28:20 28:24 Mark 1:8 1:15 3:4 6:18 6:48 7:4 7:4 7:4 7:28 9:42-48 10:2-12 10:4-9 10:7 10:8 10:11 10:12 10:13 12:26 13:7 1”
- theology (Catholic (Scholastic)) “Aquinas, Summa Theologica, Third Part (Tertia Pars), Of the Form of This Sacrament, Art. 4: Article: Whether in the aforesaid words of the forms there be any created power which causes the consecration? I answer that, Some have maintained that neither in the above words is there any created power for causing the transubstantiation, nor in the other forms of the sacraments, or even in the sacraments themselves, for producing the sacramental effects. This, as was shown above (Question [62], Article [1]), is both contrary to the teachings of the saints, and detracts from the dignity of the sacram”
- CCEL (Reformed (Old Princeton)) “Charles Hodge, Systematic Theology, Vol. 3, section 69: efficitur, eamque manducationem fructum effectamque esse fidei dico.” Institutio, IV. xvii. 5; edit. Berlin, 1834, pp. 403, 404. 664 Greek Testament, John vi. 53 ; edit. London, 1859, vol. i. p. 723. 665 See his Consensionis Capitum Expositio, Niemeyer, pp. 213, 214. 666 Ibid. p. 215. 667 Art. xxi. xxiii.; Niemeyer, p. 196. 668 Niemeyer, p. 214. 669 See page 631. 670 One of the numerous theories concerning the eucharist prevalent more or less in the early church, was that which is known in the history of doctrine as impanation. As in man ”
- Thirty-Nine Articles of Religion (Anglican) “Thirty-Nine Articles of Religion (Anglican, 1571), Section 272: Transubstantiation (or the change of the substance of Bread and Wine) in the Supper of the Lord, cannot be proved by holy Writ; but is repugnant to the plain words of Scripture, overthroweth the nature of a Sacrament, and hath given occasion to many superstitions.”
- CCEL (Reformed (Old Princeton)) “Charles Hodge, Systematic Theology, Vol. 3, section 19: 7. The theory which reduces justification to pardon and its consequences, is inconsistent with what is revealed concerning our union with Christ. That union is mystical, supernatural, representative, and vital. We were in Him before the foundation of the world ( Eph. i. 4 ); we are in Him as we were in Adam ( Rom. v. 12, 21 ; 1 Cor. xv. 22 ); we are in Him as the members of the body are in the head ( Eph. i. 23, iv. 16 ; 1 Cor. xii. 12, 27 , and often); we are in Him as the branches are in the vine ( John xv. 1-12 ). We are in Him in such”