Delivered at the Goetheanum in Dornach across late September and early October of 1921, GA 343: Vorträge und Kurse über christlich-religiöses Wirken II, widely known in English as the Foundation Course, is a cycle of lectures and seminar conversations that Rudolf Steiner gave to a gathering of theologians and young pastors. Its core subject is sacramentalism: how ritual, and above all the four constituent acts of the Mass, might be understood again as a living bridge between the human being and the spiritual world. This was the second of the three courses out of which the priestly movement called The Christ Community would be founded a year later, and it stands as one of Steiner's most concentrated treatments of religious renewal.
Because the volume was addressed to a small circle of practising and prospective clergy rather than to the general public, its tone differs from Steiner's open lecture cycles. He speaks candidly, works slowly outward from wide circles toward an inner core, and repeatedly checks his listeners' capacity to hold ideas that he freely calls paradoxical. The result is a study guide's ideal subject: dense, deliberately structured, and organized around a handful of returning motifs rather than a loose survey of topics.
Place in Steiner's Work
GA 343 belongs to the group of volumes the collected edition files under lectures to priests, alongside the surrounding numbers that treat religious and pastoral questions. It sits at the meeting point of two currents in Steiner's later activity. On one side is his anthroposophy, presented as a free act of the human spirit and, by his own insistence, not itself a religion. On the other is the request, voiced by clergy who felt the churches had grown hollow after the First World War, for a genuinely renewed form of worship. The course is Steiner's attempt to hold both without collapsing one into the other.
The volume is prefaced by a document that fixes its historical moment: an open letter from the Lutheran pastor Friedrich Rittelmeyer, who describes a generation longing for religious renewal yet mistrustful of every leader who claims to offer it. Rittelmeyer, who would become the first leader of The Christ Community, asks Steiner directly how a modern person can still have religious experience at all. The lectures answer that question in the register of practice rather than doctrine, which places GA 343 firmly among the founding texts of the movement rather than among Steiner's purely cognitive cycles.
It helps to read the course as one panel of a triptych. Steiner gave three courses to this circle of clergy in 1921 and 1922, and GA 343 is the middle and longest of them, the one in which the theological groundwork is laid before the later, more practical work on ritual texts. That position explains its patient pace. Steiner is not yet handing his listeners a finished liturgy; he is trying to give them the inner reasons a liturgy could rest on, so that whatever they later build will be founded on insight rather than borrowed from custom. The German title, which speaks of Christian religious working, signals exactly this practical aim: the course is about religious activity, not religious opinion.
Themes and Structure
The argument opens from an unexpected place: the limits of modern science. Steiner grants the materialist a point that religious thinkers often resist. In ordinary knowing, he says, the human being is a mere observer, standing beside a world of material processes and contributing nothing creative to them. He then reframes this condition, in a deliberately Christian idiom, as the final phase of a long fall, so that agnosticism itself can be felt as a form of sinfulness rather than merely a philosophical stance. Only against that background does his account of ritual make sense.
From there the course builds toward what Steiner calls the four principal constituents of the Mass: the reading of the Gospel, the offering, the transubstantiation, and communion. Each is tied to a bodily and spiritual reality he analyzes in turn. The Word is bound up with breathing, which streams the outer world into the human being and works creatively upon the body. The sacrificial act carries feeling and will into deeds that would otherwise remain merely earthly. Nutrition, examined closely, becomes a hidden process of defense in which outer substance is transformed and, in his account, spiritualized within us. It is this inner transformation that the altar makes visible.
The decisive move is the treatment of transubstantiation, which gives the volume its thematic center. Steiner presents it not as a claim about physics but as the placing before human sight of something that ordinarily happens unseen within the body itself. As he puts it, in a formulation worth quoting exactly: The transubstantiation is not an experience of the outside world. Communion then completes the sequence by uniting the person with the transformed substance, so that the four acts together restore a relationship to the cosmos that abstract knowledge alone can never supply. Read as a whole, the course is less a manual of ceremony than a phenomenology of why ceremony might matter.
Two further threads give the volume its texture. The first is Steiner's insistence that the sacrament makes visible a hidden truth rather than inventing a new one. The altar, on his reading, does not add a magical event to nature; it stages, in signs the eye can follow, a process that the body performs continually behind the veil of memory. The second thread is the question he leaves deliberately open at the close of the early lectures: if something real happens within the human being during these acts, does that inner event also reach outward into the course of nature and become a genuine world event? Steiner poses this as the work of the days to come, and the later lectures of the course take it up, tracing how a sacramental deed might weave back into the wider spiritual order rather than remaining a private experience.
For a modern reader, the enduring value of this structure is its refusal of easy alternatives. Steiner neither reduces ritual to psychology nor defends it by appeal to church authority. He builds instead from a close, almost physiological description of speaking, acting, and eating, and only then asks what it would mean to lift those everyday relations into consciously performed signs. A study of GA 343 rewards patience with exactly this: a way of thinking about worship that begins in the body and the breath and works its way, step by careful step, toward the cosmos.
Glossary Terms from this Volume
Two entries in the Thalira glossary draw directly on GA 343. Each is a hub for the concept it names, and this volume is one of their primary sources.
Transubstantiation Sacramentalism
Where to Read It
Because GA 343 was spoken to a closed circle and reconstructed partly from imperfect stenographic notes, its textual history is uneven, and no widely distributed commercial English edition circulates under a single settled title. You can read the full text, in the original German and in an English working translation, at the Rudolf Steiner Archive (rsarchive.org), which hosts the complete lecture course.
Note on translation: the English rendering of this volume is a working translation rather than a long-established published edition, so wording may differ from source to source. Where a phrase carries weight, comparing it against the German is worthwhile.
To search for related printed material and any current editions, try the publisher's catalogue at SteinerBooks (steinerbooks.org search).
Continue Your Study
To follow the ideas in this course further, these paths inside the Thalira library are a good next step:
- Begin with the two terms this volume anchors, Transubstantiation and Sacramentalism, then trace their cross-references outward.
- Browse the full Steiner glossary to place these sacramental ideas beside Steiner's wider vocabulary of spirit, soul, and cosmos.
- Return to the GA Work Library to see how the priestly courses sit within the whole collected edition.