Ernst writes that Steiner used imagination and insight as a basis for his ideas, drawing mystical knowledge from the occult Akashic Records, a work which is supposedly situated on the astral plane, and which Steiner said was accessible to him via his intuitive powers.[1] On this basis, Steiner proposed "associations between four postulated dimensions of the human body (physical body, etheric body, astral body, and ego), plants, minerals, and the cosmos".[2] Steiner also proposed a connection betweens planets, metals and organs so that, for example, the planet Mercury, the element mercury and the lung were all somehow associated.