In plain words
However great a scholar a man may be, if he has no sight he cannot see an object. Though he knows no scholarship, though he is an unlettered man, one who has eyes is able to see clearly. Though he be a great man of learning who has read all the Vedas, Śāstras, Itihāsas and Purāṇas, when he is asleep he cannot see the waking world at all. But a man who is awake, though he has read no Śāstras and knows nothing, is able to see the waking world.
In just the same way, the power of the Ātma and Ātma-jñāna, which man cannot recognise, he recognises through purity of the citta.
All the Śāstras, the Vedas and the Vedāṅgas cannot tear the screen of the jīva's mind; on this side of the screen the jīva, God beyond it; the effect on earth, the cause beyond.
As long as we look from this side of the Manas, the world appears to us. Once we cross the Manas and reach the far side, the Ātma is recognised. So whatever knowledge we experience, whatever feelings we experience, all of it we experience only from this side of the Manas; we have not reached beyond the Manas. A river that has joined the ocean has no separate form and name. Once it has merged into the ocean, it loses its form and name. The ocean alone remains. That is Brahmavit brahmaiva bhavati. To discover the Brahman-principle we need Brahma-jñāna itself. To understand the Ātma-principle we need Ātma-jñāna itself. So for the sādhaka who longs to recognise the Ātma-principle within human life, attaining the Ātma-principle through physical actions is nothing but vṛttis of the mind. The Ātma is everywhere. What is there throughout the world is this Ātma-principle itself. To think that it appears to us only because there is a body is nothing but a fancy of the mind. Whether the pot is there or not, whether there is water in this pot or not, the sun's reflection is there everywhere, all the time. When the pot and the water in the pot are there, it may be seen before the eyes; but when that is not there, one cannot say that this is not there. So whether the body is there, whether the Manas is there or not, the Ātma is there. But what do the feelings you experience today belong to?