There is a veil between the Supermind above and the lower Prakriti below - the veil of ingrained formations. This veil may completely withdraw or be partially withdrawn. Thus even if there is some little opening, with the contact of Light from above the lower nature will get slowly changed.
Sri AurobindoFor the powers of our mind, life, and body are bound to their own limitations, and however high they may rise or however widely expand, they cannot rise beyond them. But still, mental man can open to what is beyond him and call down a Supramental Light, Truth, and Power to work in him and do what the mind cannot do. If mind cannot by effort become what is beyond mind, Supermind can descend and transform mind into its own substance.
Sri AurobindoIndia saw from the beginning, - and, even in her ages of reason and her age of increasing ignorance, she never lost hold of the insight, - that life cannot be rightly seen in the sole light, cannot be perfectly lived in the sole power of its externalities.
Sri AurobindoThe language of the Veda itself is sruti, a rhythm not composed by the intellect but heard, a divine Word that same vibrating out of the Infinite to the inner audience of the man who had previously made himself fit fot the impersonal knowledge.
Sri Aurobindo