The psychic sense and consciousness, extremely useful to the individual in its own right, is still limited without the supramental transformation. It remains an individual accomplishment and, while it makes the individual receptive and aware of universal forms, forces and powers, it retains a predominantly individualised awareness.
With the supramental action upon it, the awareness shifts to the divine standpoint and thus, inevitably breaks down the artificial constructs of individuality to universalize the awareness. The individuality remains, as a nexus of energy, but not in an isolated sense.
Sri Aurobindo describes this change: “The first result of this change is to base the phenomena of the psychical consciousness on their true foundation by bringing into it the permanent sense, the complete realisation, the secure possession of the oneness of our mind and soul with the minds and souls of others and the mind and soul of universal Nature. For always the effect of the supramental growth is to universalise the individual consciousness. As it makes us live, even in our individual vital movement and its relations with all around us, with the universal life, so it makes us think and feel and sense, although through an individual centre or instrument, with the universal mind and psychical being.”
Sri Aurobindo, The Synthesis of Yoga, Part Four: The Yoga of Self-Perfection, Chapter 24, The Supramental Sense , pp. 848-849