The Boundaries of Natural Science Author:Rudolf Steiner If nothing is within the reach of scientific research except what is in the world of the senses, the doors are closed to the worlds in which human beings originate and where the creative forces of the world are at work. Rudolf Steiner calls on us to develop organs of perception that go beyond the physical limits of cognition, to where we can beh... more »old the activity of spirit in natural phenomena.« less