Sage Sri, Goudpada says: that whatever is seen, whether external or internal, whether by the ordinary persons or yogis is unreal.
The Gurus say scriptures says “Brahman = I" is an error because the ‘Self’ is not the ‘I ’. If the scriptures says ‘ I’ wasn’t there it means there is no ‘I’. Thus, do not hold ‘I ’ as the ’Self’. Do not use the word ‘I’, for the ‘Self’ because the ‘Self’ is the witness of the ‘I ’.
What is it that appears as the ‘I’ and disappears as the ‘I-less? It is the Soul, which is present in the form of the consciousness.
Do not make the mistake of holding the ‘I ’ as the Self because it is not permanent. ‘I’ disappears and becomes ‘I’-less. The ‘I’ disappears as I-LESS.
Bhagvad Gita: ~ The permanent is always there, only the transient ‘I’ comes and goes. (2.18)
The ‘I’ hides the truth of the whole. The ‘I’ is an object to the Soul, which is the formless subject.
The earliest ancient sages used the word ‘I’ to the witness of the three states not to the ego as moderns use it and think the ‘I’ without the body is the Self. The seeker has to understand the fact that the fact that ‘I’ is not the Self, but the witness of the ‘I ’ is the true Self, which is eternal.
That is why Ashtavakra Gita 16:10: ~ If you desire liberation, but you still say "I," If you feel the ‘Self’ is the ‘I ’, You are not a wise man or a seeker. You are simply a man who suffers.