The supermind has various poises, depending on which level of the manifestation it is acting upon at the moment. It can take its native poise at the highest levels of Existence-Consciousness-Bliss, and it can take a poise of action through the individual soul in manifestation. In each case, the expression is modified or tempered to bring about the intended result for the role that is being played at the time. There are therefore, as Sri Aurobindo explains, various gradations or levels of supramental awareness that can be conceived, and the human individual, undertaking the evolutionary ascent, will experience successive levels of widening and heightening awareness and power of action. There is a famous sloka which expresses the sense of going from darkness to light, then from light to greater light. The levels of the supramental consciousness represent the “light to greater light” portion of this insight.
“It must be remembered that there is always a difference between the supreme Supermind of the omniscient and omnipotent Ishwara and that which can be attained by the Jiva. The human being is climbing out of the ignorance and when he ascents into the supramental nature, he will find in it grades of its ascension, and he must first form the lower grades and limited steps before he rises to higher summits. He will enjoy there the full essential light, power, Ananda of the infinite self by oneness with the Spirit, but in the dynamical expression it must determine and individualise itself according to the nature of the self-expression which the transcendent and universal Spirit seeks in the Jiva. It is God-realisation and God-expression which is the object of our Yoga and more especially of its dynamic side; it is a divine self-expression in us of the Ishwara, but under the conditions of humanity and through the divinised human nature.”
Sri Aurobindo, The Synthesis of Yoga, Part Four: The Yoga of Self-Perfection, Chapter 19, The Nature of the Supermind, pg. 768