"Only the Supreme Self,which is ever shining in your Heart as the reality, is the Sadguru. The pure awareness, which is shining as the inward illumination 'I', is His gracious feet. The contact with these (inner holy feet) alone can give you true redemption. Joining the eye of reflected consciousness (chidabhasa), which is your sense of individuality, to those holy feet, which are the real consciousness, is the union of the feet and the head which is the real significance of the word asi ( the verb in tat tvam asi, that thou art). As these inner holy feet can be held naturally and unceasingly, hereafter, with an inward turned mind, cling to that inner awareness which is your real nature. This alone is the proper way for the removal of bomdage and the attainment of the supreme truth."
And the following statement of Sri Bhagwan:
" Surrender is to offer fully, in silence, the subsided ego, which is a name-and-form thought, to the 'aham sphurana' ( the effulgence of "I" ), the real holy feet of the gracious Guru."
Thus in the first statement, the union of unbroken 'I' with the the sense of individuality is the union of the feet and the head and not merely physical prostration. If, by enquiry, first the subject 'I' can be segregated successfully from the predicate in the " I am the body or I am so and so, etc." idea, if the sentient principle can be isolated from the insentient part in the ego, it can hold the inner holy feet naturally and unceasingly.