A lecture delivered by Rudolf Steiner at Dornach on the 28th of January, 1923. From stenographic notes, unrevised by the lecturer. Lecture 12 of 12 from the volume: A Living Knowledge of Nature, the Fall of the Intellect into Sin, the Spiritual Resurrection, from Steiner’s Lectures on Spiritual Essence series. This lecture is also known as: Moral Influences of Light and Unmoral Influences of Electricity. This lecture series is available only as typed Journals. The volume of the Complete Edition of the works of Rudolf Steiner containing the original text of the this lecture, among eleven others, is entitled: Lebendiges Naturerkennen, Intellektueller Suendenfall und Spirituelle Suendenerhebung. (No. 220 in the Bibliographical Survey, 1961).