Knowledge of Soul and Spirit gathers the fifteen public lectures Rudolf Steiner gave in Berlin, with several delivered in Munich, across the winter season of 1907 and into the spring of 1908. Catalogued as the fifty-sixth volume of his collected works, it belongs to the long series of open evening talks Steiner held for a general city audience rather than to the private cycles reserved for members of the Theosophical Society. The subject that binds these lectures together is the claim named in its title: that the human soul and spirit can be studied with the same seriousness a physicist brings to matter, and that questions of daily life, from the relation of the sexes to sickness, work, and the afterlife, look different once that inner science is taken up. Across the cycle Steiner moves from a defence of what he calls secret or spiritual science to concrete human concerns, arguing throughout that supersensible knowledge is meant to strengthen ordinary living, not to withdraw from it.
Place in Steiner's Work
This volume comes from the middle of Steiner's Berlin lecturing years, the period when he was building anthroposophy in public while still working within the Theosophical framework he would formally leave in 1912 and 1913. The tone here is deliberately outward-facing. Where his written books of the same decade, such as the outline of an esoteric cosmology or the guide to inner development, address readers already committed to the path, these evening lectures are addressed to the sceptical, educated Berliner who reads the newspaper science column and doubts that anything lies behind the senses. Steiner opens the cycle by meeting the materialism of his day on its own ground, granting the genuine achievements of natural science before arguing that a trained inner faculty extends knowledge rather than contradicting it. Because the lectures answer real objections of 1907, the volume is a useful record of how Steiner defended his method in the years just before he gave anthroposophy its own name and institutions.
The setting also shapes the style. These were paid public evenings, announced in a printed programme, and Steiner tailored each talk to stand on its own while still building on the ones before it. He tells stories from his own train journeys, quotes the popular science books of the moment, and answers the objections he had actually heard in earlier discussion evenings. A reader who wants to see how Steiner met the ordinary questions of a modern city, rather than the specialised concerns of his students, will find this volume among the clearest examples in the collected works. It sits alongside the neighbouring lecture volumes of the same seasons, which share the pattern of an autumn-to-spring cycle of open talks on the riddles of the soul.
Themes and Structure
The cycle opens with three lectures on method: the mission of spiritual science in the present age, natural science standing at a crossroads, and the knowledge of soul and spirit that gives the volume its name. In these Steiner sets out his two founding convictions, that a supersensible world stands behind the sense world and that the human being can develop organs of cognition to perceive it. He compares the certainty of such inner knowledge to the certainty of a mathematical proof, which no majority vote can overturn and which anyone can reach by fulfilling the same conditions.
In these opening talks Steiner also introduces the three paths into the supersensible that recur throughout his work, which he names imagination or clairvoyance, inspiration, and intuition. He distinguishes the clairvoyant, who can perceive the spiritual world, from the initiate, who understands its truths once they have been spoken, and from the adept, who has learned to work with spiritual forces. He is careful to insist that clairvoyance is needed only to discover these truths, never to grasp them: once expressed in forms suited to modern thinking, they can be followed by anyone willing to think clearly.
From method the lectures turn to the human being directly. Two of the best known talks treat man and woman, and then man, woman, and child, in the light of spiritual science. Here Steiner draws on his account of the fourfold human being, the physical body, the etheric body, the soul or astral body, and the ego, to argue that each person carries the opposite sex within the etheric nature. The result is a reading of masculine and feminine as poles present in everyone rather than fixed traits of one body. He connects this to repeated earthly lives, in which a soul gathers experience through both male and female incarnations. Further lectures examine the soul life of animals, which Steiner approaches through the idea of shared group souls rather than individual egos, together with the meaning of initiation, its so-called dangers, and the moral weight of profession and income.
A striking pair of lectures addresses health and the imagination. In the talk on illusory illness Steiner tells of two travellers on a train, each convinced of sicknesses drawn from the health pamphlets of the day, to show how false thoughts can undermine real wellbeing, a theme he extends in the companion lecture on the feverish pursuit of health. The cycle closes with lectures of a wider cosmic reach, on sun, moon, and stars, on the beginning and end of the earth, and finally on the old images of hell and heaven, which Steiner reads not as places but as states of soul experienced after death.
Glossary Terms from this Volume
Two entries in the Thalira glossary trace their source material to this cycle. Each links to a fuller discussion of the idea and its place in Steiner's thought:
The first draws on the Munich lecture of March 1908, in which Steiner sets his fourfold picture of the human being against the materialist debates of his time. The second draws on the December 1907 lecture on imagined sickness, where the relation of thought to bodily health is made vivid through everyday observation.
Where to Read It
You can read the full text of this cycle at the Rudolf Steiner Archive, which hosts English translations of the individual lectures alongside the original German. Visit the archive at rsarchive.org and search its lecture listings for the volume. For print editions and related titles from the publisher of Steiner's work in English, search SteinerBooks at steinerbooks.org. As with much of Steiner's spoken work, several lectures in this volume exist in more than one translation, so comparing versions can be worthwhile when a passage matters to you.
Anthroposophical science does not exist in order that human beings be estranged from life through some kind of mysticism.
Continue Your Study
To follow the ideas of this volume further within the Thalira collection, you might:
- Browse the full Thalira glossary to see how the terms above connect to the wider vocabulary of Steiner's spiritual science.
- Read the entry on Man and Woman in the Light of Spiritual Science to explore Steiner's teaching that each person carries the opposite sex within the etheric body.
- Study the entry on Illusory Illness to see how Steiner links the health of the body to the truth or falsehood of our thoughts.