Essential six exercises are the key in the path of knowledge and self-development which Rudolf Steiner presented. They prepare a healthy entry to spiritual and esoteric work. Rudolf Steiner said that we need to practice them in order to develop our heart chakra. The first condition is the cultivation of absolutely clear thinking. For this purpose we must rid ourselves of the will-o'-the-wisp thoughts, even if only for a very short time during the day - about 5 minutes (the longer, the better). We must become the rulers of our world of thought...