The specific ways supersensible research goes wrong, all traceable to the unpurified researcher rather than the spiritual world, each eliminated by radical self-knowledge.
Sources of Error in Spiritual Research in Anthroposophy is Rudolf Steiner's account of the specific ways supersensible investigation goes wrong: mistaking projected soul-pictures for objective beings, letting subjective belief colour results, and mixing sense and supersense after interrupted training. Steiner set them out in two 1912 Munich lectures, later collected as Truths and Errors of Spiritual Research (GA 69). The error never lives in the spiritual world itself; it enters through the unpurified researcher. Each source is eliminated by one discipline: radical self-knowledge, the encounter with the guardian of the threshold, by which the seer removes everything personal from what is left over. The lay listener tests the results with healthy human understanding, the common sense that exposes charlatanism. Self-knowledge and sober judgement together form the anti-charlatanism stance at the centre of Steiner's epistemology.
In Steiner's Own Words
Thus, the determinative of truth or error in spiritual research is not anything that you acquire to yourself as a seer only, but something that you have already acquired before in intellectual and moral respects. In particular, moral things are strongly involved in how one interprets the supersensible phenomena. Someone who is prejudiced in a certain belief who has sympathies and prejudices for the fact that something certain should be true, brings this disposition, this prejudice into the supersensible world; he interprets the phenomena after it. Everything that he fathomed and announced of the spiritual world can be an error because it is coloured with his subjective belief.
What it Means Today
Read as epistemology, GA 69 is a theory of testing. Steiner's three error-sources share one root: the researcher who has not eliminated himself reads his own soul back into the spiritual world. He names them plainly across the two Munich lectures. The Imaginative beholder mistakes projected pictures for objective beings ("you yourself are all that, projected onto space"). The investigator lets prejudice and subjective belief colour every result. The half-trained soul, interrupting its discipline, mixes what the senses give with what the supersense gives and grows confused. The remedy is the same in each case: radical self-knowledge carried to the encounter with the guardian of the threshold, the step where the seer removes everything personal from "that which is left over." This is error-elimination by self-purification, not by external proof.
The second guard is for everyone else. Because spiritual research touches the most intimate questions of life, Steiner warns that belief in authority breeds charlatanism, and that the only protection is healthy human understanding, the common sense by which a layperson who is no seer can still judge what the researcher reports. He insists the listener "make it as difficult as possible" for the researcher and apply sober judgement constantly. The seer's value, like a chemist's or a tailor's, rests on his power of judgement and moral attitude, not on the gift of sight. Thalira synthesis: Steiner's anti-charlatanism stance reverses the usual mystical claim. Here, the more extraordinary the vision, the more ordinary the test, healthy human understanding, must remain sovereign over it.
Where to Read More