Yoga the goal is to move inward and discover the Psychic Being, which then can bring about a transformation of the outer nature. This transformation of the outer being or ego by the Psychic is called Psychicisation; it is one of the three necessary stages in the realisation of the Supramental consciousness. This Psychic transformation is the decisive movement that enables a never-ending progress in life, through the power of connecting to one's inner spirit or Divine Essence. The Psychic begins its evolution completely veiled and hidden, but grows through successive lifetimes, and gradually exerts a greater influence, taking on the role of spiritual Guide. Central being Central Being refers to the transcendent and eternal spirit, as opposed to the incarnate and evolving Soul, which he calls the Psychic Being. Sometimes it refers to both of them together as the essential spiritual core of the being. The Central Being "presides over the different births one after the other but is itself unborn" (ibid p. 269). This transcendent Central Being or Spirit is also designated as the Jiva or Jivatman, although the meaning of these terms in Sri Aurobindo's philosophy differs greatly from that of much of conventional Vedanta (especially Advaita Vedanta) Levels of being The levels of being ascend from the inconscient to the Supermind. Inconscient Inconscient Matter is the lowest level of involution. Spirit is still present in the inconscient: "The Inconscient is the Superconscient's sleep." The Inconscient is also the instrument of the Superconsciousness which has created the Universe. According to Satprem, the Inconscient lies at the bottom of the physical subconscient, and "life emerged ... at the border between the material inconscient and the physical consciousness ... in our body. Subconscient and subtle or subliminal conscient The physical, vital and mental levels of being contain both a subconscient and a subtle or subliminal part. The subconscient The subconscient parts are the submerged parts. It contains "obstinate samskaras, impressions, associations, fixed notions, habitual reactions formed by the past." According to Satprem, there are several levels of the subconscient, corresponding with the different levels of our being: a mental subconscient, a vital subconscient, and a physical subconscient, down to the material Inconscient. According to Aurobindo, the body is partly a creation of the inconscient or subconscient. According to The Mother, the ordinary, false consciousness, which is common to material body-consciousness, is derived from the subconscient and the inconscient. According