Recorded in Dornach across the autumn of 1915, The Value of Thinking for Satisfying our Quest for Knowledge gathers eleven lectures in which Rudolf Steiner asks what thinking can actually do for a person who wants real knowledge of the world. Catalogued as GA 164 in the collected works, the cycle runs from mid September into October of that year, with one episodic session added from late August. It is a working through of a single problem: whether the ordinary thinking prized by science and philosophy can reach the spiritual reality it keeps circling, or whether it stops at the threshold. Steiner treats that question first in its own right, then tests it against the natural science of his day, and finally turns it on the concepts of atom, space, time, and motion that physics had made into the furniture of the material world.
Place in Steiner's Work
By 1915 Steiner had already given the foundations of anthroposophy its written form in books such as his theory of knowledge and his outline of the higher worlds. What this cycle adds is a sustained epistemological argument aimed squarely at scientists and philosophers rather than at students of esoteric practice. Where much of his output describes spiritual worlds, GA 164 pauses to defend the instrument used to describe them. That makes it a companion to his more philosophical writing, especially the accounts of thinking he had set out earlier, and a bridge toward the science lectures he would give in the following decade.
The setting matters too. These talks were given at the Goetheanum during the first years of the First World War, to an audience building that structure by hand. Steiner speaks to people who were being asked to take spiritual science seriously at a moment when materialist confidence was at its height. The cycle answers a charge he names directly: that anthroposophy is unscientific, or that trained scientists can make nothing of it. His reply is not to reject science but to examine what its own thinking rests on.
Read this way, GA 164 belongs with the strand of Steiner's teaching that takes Goethe as its model of knowing. He points more than once to Goethe's poems on the metamorphosis of plants and animals, and asks the listener not merely to admire them but to think their thought through from first line to last, then let it sink and rise again as something living. That exercise, repeated many times, is offered as a picture of what active thinking feels like from the inside. The cycle therefore sits at the meeting point of his epistemology and his practice: it explains, in argument, the same inner mobility of thought that his guidance on inner development asks the student to cultivate.
Themes and Structure
The eleven lectures fall into three movements. The first four, titled simply "The Value of Thinking," open the inquiry. Steiner sets the sentence of Aristotle, that there is nothing in the mind that is not first in the senses, beside Leibniz's amendment, that the intellect itself is the exception. From that small correction he draws a large consequence: thinking is a real activity, carried out in what he calls the etheric body, and it is not itself a product of sensory perception. The philosopher who tries to reach reality through the intellect alone is left holding an instrument that seems cut off from the world it wants to know. Steiner treats this predicament as the hidden reason so many world views contradict one another.
The central group, six lectures on "The Relationship Between Spiritual Science and Natural Science," works outward from a specific text, a 1914 brochure on science and theosophy, and uses it to stage the encounter. Here Steiner is generous toward natural science as a method. He grants that materialist research has achieved what no one could live without, and locates its failure not in its findings but in the move from method to world view. To study a body by counting stamens or staining a section is to stand passively before nature, and that passivity, he argues, is easier than the active thinking spiritual science demands. His complaint is against intellectual inertia, against mistaking a way of investigating for a picture of the whole.
He illustrates the difference with an image drawn from art. To know the painter Raphael, he says, one studies the paintings themselves, the arrangement of figures, the play of light and shadow, until a sense of the artist's soul forms out of the work. The person who claims to skip the paintings and gaze straight into Raphael's soul would be dismissed as a fantasist, yet Steiner observes that in spiritual matters exactly this shortcut is often attempted. His demand is the reverse: the student of the spirit must first take up what materialist research has honestly produced, the anatomy, the chemistry, the physics, and then think it further, rather than bypassing it. This is why the science lectures spend so long on the details of a rival author's argument. Steiner is modeling the patient reading he asks of his own listeners.
The closing lecture, an episodic observation on space, time, and movement, is the sharpest. Steiner takes the schoolbook formula that distance equals speed multiplied by time and shows, by a careful distinction between two kinds of division, that time in this formula reduces to a mere number while speed alone remains an inner property of the moving thing. From this he presses his conclusion that velocity, not time, is what mechanics should rest on:
"not time but velocity is what must underlie mechanics."
The same lecture turns on the atom. Steiner grants that heat may be described as the motion of atoms, yet he holds that no atom can ever be perceived, that the atomic picture is assembled from nothing visible. He then presses the contradiction the physics of his day had built into it: the atom must be indivisible to be an atom at all, yet must be elastic, and therefore divisible, to explain how atoms collide and rebound. He notes with some irony the era's fashion for treating matter as almost nothing, "holes in the ether." His point is not to settle physics but to show that atomism, taken as a world view, rests on ideas that cancel each other out. He is equally wary of the new theory of relativity, whose treatment of time and simultaneity he examines through a thought experiment about an observer moving faster than light. Throughout, the argument is consistent: the concepts physics treats as bedrock are constructions of thinking, and thinking must first understand itself before it can trust them.
Glossary Terms from this Volume
Two entries in the Thalira glossary draw directly on GA 164. Each collects the volume's argument on a single concept and places it beside Steiner's wider vocabulary.
Where to Read It
You can read the full text of the cycle in English at the Rudolf Steiner Archive, where the individual lectures appear in the online translation prepared by the Steiner Online Library. For print editions and related titles, search the publisher directly at SteinerBooks. When you read, hold the three movements in view: the defense of thinking, the meeting with natural science, and the closing critique of atom, space, and time. The last lecture rewards a slow reading, since its argument turns on a distinction most physics books pass over.
Continue Your Study
To follow the threads GA 164 opens, several paths are close at hand.
- Begin with the two terms this volume anchors, Atomism and Space, Time and Movement, then trace where they lead across the wider glossary of Steiner's terms.
- Return to the GA Work Library to see how this cycle sits among Steiner's other volumes on knowledge and natural science.
- Read the volume itself in three sittings, one for each movement, and let the argument about thinking settle before turning to the lecture on space and time.