In other words, for Luther, the Eucharist (and by implication Baptism as well), confirms for the individual what the word universally proclaims. The word of the gospel is addressed to everyone in the congregation, and therefore it is possible to worry that this promise may not apply to you as an individual, or you have not genuinely received it by faith. Nevertheless, the Lord’s Supper contains within it the same promise and presence of the risen Jesus as the sermon. For Luther, words are sacraments and sacraments are a kind of word. The difference between the sermon and the sacrament is that the latter is applied to the individual who directly receives it. When reflective faith invariably worries about whether or not one has individually received Jesus and his promise of forgiveness, the believer may rely on the sacraments to give them assurance. There can be here no doubt that you have personally received the promise in the form of the sacrament since it was you as an individual who heard the promise and consumed the elements. By receiving the Eucharistic elements, the promise and presence of Jesus are given to you as an in tangible and physical way that draws you out of your subjectivity and enthusiasm (Did I truly believe? Did I truly receive the promise?) to the objectivity of the gospel.
From the draft manuscript for Jack D. Kilcrease, Justification by Word: Restoring Sola Fide (Lexham Press, 2022), 303-304.
Image from “Icon-of-Christ-the-Holy-Communion,” Catholic Stewardship Consultants, August 2, 2018, https://www.catholicsteward.com/2018/08/02/stewardship-bulletin-reflection-august-19-2018/icon-of-christ-the-holy-communion/.