Psychicisation is one of the most essential stages of the integral yoga of Sri Aurobindo. As described in The Life Divine (book II - chapter 25) it refers to a spiritual movement inward, so that one realises the psychic being - the psychic personality or Divine Soul - in the core of one's being, and enable this to transform the outer being, as well as serve as a spiritual Guide in the yoga.
In Integral Yoga the Psychic transformation is sometimes described as follows: The three central spiritual methods of connecting to the Spirit are Consecration, Moving to the Depths (Concentration), and Surrender. Consecration is to open to the Force before engaging in an activity. Moving to the Depths (or Concentration) is a movement away from the surface existence to a deeper existence within. In the deepest depths one discovers the Personal Evolving Soul. Surrender is to offer all one's work, one's life to the Divine Force and Intent (Synthesis of Yoga Part I ch.II-III; Letters on Yoga vol.II pp.585ff (3rd ed.)) As we connect to the evolving soul within, we not only move away from ego, ignorance, finiteness, and time; not only perceived our limitations of being and overcome them; but we also open to the universal plane. This is the Psychic transformation in progress.
From there the light, peace, power is drawn into and descends into the body, transforming all of its parts — physical, vital, and mental. This is the Spiritual transformation. Psychicisation can serve as a prequel to spiritualisation (equivalent to "Enlightenment"), although they do not have to follow any sort of order. However, both the psychic and the spiritual transformation are equally necessary for the final stage of Supramental transformation.
As the crust of the outer nature cracks, as the walls of inner separation break down, the inner light gets through, the inner fire burns in the heart,...and the deeper psychic experiences, those which are not solely of an inner mental or inner vital character, become possible in this subtler, purer, finer substance; the soul begins to unveil itself, the psychic personality reaches its full stature. The soul, the psychic entity, then manifests itself as the central being which upholds mind and life and body and supports all the other powers and functions of the Spirit; it takes up its greater function as the guide and ruler of the nature. A guidance, a governance begins from within which exposes every movement to the light of Truth, repels what is false, obscure, opposed to the divine realisation: every region of the being, every nook and corner of it, every movement, formation, direction, inclination of thought, will, emotion, sensation, action, reaction, motive, disposition, propensity, desire, habit of the conscious or subconscious physical, even the most concealed, camouflaged, mute, recondite, is lighted up with the unerring psychic light, their confusions dissipated, their tangles disentangled, their obscurities, deceptions, self-deceptions precisely indicated and removed; all is purified, set right, the whole nature harmonised, modulated in the psychic key, put in spiritual order.— Sri Aurobindo, The Life Divine, 907-8
- Psychicisation - Kheper website