7. Manifestations of the Unconscious

For this reason I must also speak of borderline regions which through their very abnormality point to certain secrets of existence but can only really be understood through Spiritual Science and without it are bound to lead to countless fallacies about the true nature of spiritual life. The vast range, the interest and enigmatic character of the borderline region of which I shall speak is to some extent known to everyone, for it points to certain connections between external life and its hidden foundations. I am referring to man's life of dream. Starting from this life of dream it will be necessary also to consider other borderline regions of existence whose phenomena, if experienced in an abnormal way, might induce the belief that they lead a man to the foundations of life. I shall therefore also speak of the phenomena of hallucination, of visionary life and of somnambulism and mediumship, as far as this is possible in the framework of a single lecture.