The term involution has various meanings. In some instances it refers to a process prior to evolution which gives rise to the cosmos, in others it is an aspect of evolution, and in still others it is a process that follows the completion of evolution in the human form.
According to esoteric cosmology In theosophy, anthroposophy and Rosicrucianism, involution and evolution are part of a complex sequence of cosmic cycles, called Round. When the universe attains a stage of sufficient density, the individual spirit is able to descend and participate in the evolution. Involution thus refers to the incarnation of spirit in an already established matter, the necessary prerequisite of evolution:
As an example, the so-called descent of the Monad into matter means an involution or involving or infolding of spiritual potencies into material vehicles which coincidentally and contemporaneously, through the compelling urge of the infolding energies, unfold their own latent capacities, unwrap them, roll them forth; and this is the evolution of matter. That period of time devoted to the attainment of self-consciousness and the building of the vehicles through which the spirit in man manifests, is called involution. Its purpose is to slowly carry life lower and deeper into denser and denser matter for the building of forms, till the nadir of materiality is reached. From that point, life begins to ascend into higher Worlds. This succeeding period of existence, during which the individual human being develops self-consciousness into divine omniscience, is called "spiritual evolution". In the cosmology of Surat Shabda Yoga, involution and evolution apply to both the macrocosm, the whole of creation, and the microcosm, the constitution of an individual soul. The Rosicrucian Cosmo-Conception, a Rosicrucian text written by Max Heindel, advances the concept of epigenesis as the key related to the evolution (after an involutionary period) of human beings.
According to Sri Aurobindo
Introduction
For Sri Aurobindo, involution is the process by which the Omnipresent Reality, i.e. the Absolute, Brahman extends Itself to create a universe of separate forms from out of Its own Force/Energy. Sat, Chit-Tapas, and Delight/Ananda are the three aspects of Satchitananda, and they are part of involution. Spirit or consciousness manifests as these three, and then as the intermediate link of Supermind, which is transitional between the higher and lower (matter, life, and mind) nature. The reason for involution is Delight—the Delight of Being (the Spirit or Absolute) moving to Delight of Becoming (temporal existence, the cosmos). Being throws itself forward into a multiplicity of forms, becoming lost in the inconscience of matter, and then through evolution it partakes in the Delight of rediscovering the Spirit which had been hidden in the interim. Evolution is thus the movement forward by which the created universe evolves from its initial state of inconscience (i.e. as matter), evolves animated life forms and mental beings (i.e. humans), and continues to evolve spiritual properties, and in that process rediscovers its Source. Such an Evolution of animated forms is only possible because at each stage of development, the developing entity contains within itself the conception of what it may become. Thus, the evolution of animated life out of matter supposes a previous involution of that animated capacity. This is akin to a seed that already has the essence of the tree that will emerge from it. Each plane emerges from an earlier plane through the evolutionary process, which takes place in chronological time. But in a parallel construction, each of these new planes can be understood as being a descendant of its corresponding higher order plane from the Infinite. Thus, when mentality emerged in the universe, the universal plane of Mind was implanted to a degree in those beings harboring that mentality. The evolution is the development of all entities in the cosmos, including humans, in order to attain their fulfillment, including the discovery of spiritual Delight, which was, and always is, the experience of the Source Creator. The evolution is the progressive development from the original inconscience of matter into life (movement, sensation, desire, etc. and living physical beings), and from thence to mind (in conscious animals and most especially humans—the self-conscious thinking animal), and from thence to spiritualized mind, culminating in The Supermind or Truth Consciousness (as supramental individuals, and finally the supramental, i.e. a divine life on earth).
Sat We cannot speak of Sat without Chit and Ananda—-or Being, Consciousness and Bliss, respectively. They represent a totality. Sat is the vital state of that which is, was and always will be. In a sense it is a beginnining but because it is pregnant with possibility it is inexorably tied to Ananda or the recognition of Being and then the subsequent realization of bliss which is divine inner knowing. Each flows out of the other and then back again. It could be said that Sat only exists through Ananda or Consciousness however, these levels of differentiation cannot grasp the true nature of either of these three qualities since they are interdependent. "Sat—being, existence; substance; "pure existence, eternal, infinite, indefinable, not affected by the succession of Time, not involved in the extension of Space, beyond form, quantity, quality", the first term of saccidananda and the principle that is the basis of satyaloka; "the spiritual substance of being" which is cast "into all manner of forms and movements"; existence as "the stuff of its own becoming", which on every plane is "shaped into the substance with which Force has to deal" and "has formed itself here, fundamentally, as Matter; it has been objectivised, made sensible and concrete to its own self-experiencing conscious-force in the form of self-dividing material substance" short for sat brahman."
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