The substance (essence) is the soul, eternal and unchangeable form / matter. In what or in whom is the substance enclose? Substance is present in any changeable forms: inanimate (dead) and living. The distinctive (specific) quality of the disclosure of the substance of the self is the realization of free will. Inanimate matter, from living substance, is distinguished by the limitations of its being, which is a punishment. Living matter shows the will to build, the will to all ordering and to the whole dispensation; living matter and its substantive "I" (ego) increase their zone of concepts and inventing, naming the subjective and objective categories of natural being. How does the ever-changing form preserve its "ego" in the eternal unchanging substance?
   The soul is an experience accumulator, which in otherness (inomatter) becomes without personal, losing the changeable form of its "I" and retaining the presence of its previous "I", forming the eternal changing foundation of substances. In this case, the substance becomes a constantly changeable form, preserving its non-variability and individual "I" during subsequent installation (soul relocation, reincarnation, μετ-εμψύχωσις ) into ever-changing non-living and living matter. If the substance is "ever-changing form" in otherness, then how will it preserve its ever-transmitting "I" in these forms? Why do you need this experience (praxis)? The soul, being in otherness, has a full memory of its previous incarnation, isolates (emit) the main thing from the lifetime experience and saves it for its subsequent incarnations. What is it for (required)? In order to establish the boundaries of the substantial, perception of my entity (existence). Why did the substance in its arche (ἀρχή ) (at the beginning of creation) not have its limits of existence? Personally experienced their experience better than borrowed (adopted) someone else. For the foundation of an independent unit with free will, personal praxis is required. The laws of the universe are eternal and unchanging, and have their own "world of ideas", from which creatures with free will repel. There are many ideas, they are different and they are alive. All these substances and ideas are - eternal, not changeable, constantly changing, as a consequence of the influence of the collegial universal substantive solution, in order to achieve the best idea of the self. Eternally changing and forever not changeable ideas - metamorphosis occur with them to achieve their universal without personal and ideal (perfect) form. These substances, ideas, being in otherness, reached their perfect development of the "I" through numerous rebirth, until they realized themselves and their "I" in the form of certain ideas. For example: "bridge", "concrete", "river", "sky" etc. Not all ideas have perfect ideas. As universe develops, substance, living in the law of paradox and dialectics, reaches and discovers new levels of being and non-being through its praxis.