In his philosophy of nature he declared the One Thing to be Fire, but Fire of a mystical nature, "self-kindled and self-extinguished," the vital quickening power of the universe. It was that Universal Life, by participation in which all things have their being, and apart from which they are unsubstantial and unreal. This is the "Tree of Life" spoken of by Simon. In this Ocean of Fire or Life--in every point or atom of it--is inherent a longing to manifest itself in various forms, thus giving rise to the perpetual flux and change of the phenomenal world. This Divine Desire, this "love for everything that lives and breathes," is found in many systems, and especially in the Vedic and Phoenician Cosmogony. In the _Rig Veda_ (x. 129), it is that Kâma or Desire "which first arose in It (the Unknown Deity)," elsewhere identified with Agni or Fire. In the fragments of Phoenician Cosmogony, recovered from Sanchuniathon, it is called Pothos ([Greek: pothos]) and Erôs ([Greek: eros]). In its pure state, the Living and Rational Fire of Heracleitus resides in the highest conceivable Heaven, whence it descends stage by stage, gradually losing the velocity of its motion and vitality, until it finally reaches the Earth-stage, having previously passed through that of "Water." Thence it returns to its parent source. In this eternal flux, the only repose was to be found in the harmony that occasionally resulted from one portion of the Fire in its descent meeting another in its ascent. All this took place under Law and Order, and the Soul of man being a portion of the Fire in its pure state, and therefore an exile here on Earth, could only be at rest by cultivating as the highest good, contentment ([Greek: euarestaesis]), or acquiescence to the Law. The author of the _Philosophumena_ professes to give us some additional information on this philosopher who "bewailed all things, condemning the ignorance of all that lives, and of all men, in pity for the life of mortals," but the obscure philosopher does not lend himself very easily to the controversial purposes of the patristic writer. Heracleitus called the Universal Principle ([Greek: ton hapanton archae]) Intellectual Fire ([Greek: pur noeron]), and said that the sphere surrounding us and reaching to the Moon was filled with evil, but beyond the Moon-sphere it was purer.[97] The sentences that the author quotes from Heracleitus in Book IX, are not only obscure enough in themselves, but are also rendered all the more obscure by the polemical treatment they are subjected to by the patristic writer. Heracleitus makes the ALL inclusive of all Being and Non-Being, all pairs of opposites, "differentiation and non-differentiation, the generable and ingenerable, mortal and immortal, the Logos and Aeon, and the Father and Son," which he calls the "Just God." This ALL is the "Sadasat-Tatparam yat" of the _Bhagavad Gîtâ_, inclusive of Being (Sat), Non-Being (Asat), and That Which transcends them (Tatparam yat).[98]