Rudolf Steiner's fundamental handbook for spiritual and personal development continues to grow more ?modern? each day. His methods nevertheless remain clearly distinguishable from the many others that are generally available today. First, Steiner's path of spiritual growth is based on the clarity of thought normally associated with scientific research. Rather than denying clear thinking, his aim is to extend it beyond its present limitations. Second, Steiner recognizes?as all genuine disciplines always have?that the path to spiritual experience is arduous and dangerous, calling for tremendous self-control in thinking, speech, and action. The human being is a unity, and we cannot develop real knowledge without a corresponding development of feeling and volition.