I. Natural Science and Its Boundaries
Anyone who is less conscientious about what he communicates from the spiritual world might perhaps smile at the idea of being held up in this way by a temporarily insurmountable difficulty. But one who feels a full sense of responsibility and applies it in all descriptions of the path that Western humanity must take towards Imagination knows that to find the right words entails a great deal of effort. As a path of training it is comparatively easy to describe, and this has been done in my book Knowledge of the Higher Worlds. But if one's aim is to achieve a definite result such as that of describing the essential nature of man's senses—a part, therefore, of the inner make-up and constitution of humanity—it is then that the difficulties appear, among them that of grasping Imaginations and presenting them in clear contours by means of words.