Mandukya Karika, verse 4.73


योऽस्ति कल्पितसंवृत्या परमार्थेन नास्त्यसौ ।
परतन्त्राभिसंवृत्या स्यान्नास्ति परमार्थतः ॥ ७३ ॥

yo'sti kalpitasaṃvṛtyā paramārthena nāstyasau |
paratantrābhisaṃvṛtyā syānnāsti paramārthataḥ || 73 ||

73. That which exists on the strength of the illusory experiences does not, really speaking, exist. That which, again, is said to exist on the strength of the views supported by the other schools of thought, does not, really speaking, exist.

Shankara Bhashya (commentary)

(Objection)—It has been said that the mind is free from the relation with any objects, as such objects do not exist. But this non-attachment regarding the mind cannot be maintained inasmuch as objects in the forms of the teacher, the Scripture and the pupil exist. (Reply)—There is no such defect in our contention. (Objection)—How? (Reply)—The1 existence of such objects as Scripture, etc., is due to the empirical experience which is illusory. The empirical knowledge in respect of Scripture, teacher and taught is illusory and imagined only as a means to the realisation of the Ultimate Reality. Therefore Scripture, etc., which exist only on the strength of illusory empirical experiences, have no real existence. It has already been said that duality vanishes when the Ultimate Reality is known. Again, the2 objects (which appear to come into existence through the illusory experiences), supported by other schools of thought as existent, do not, when analysed from the standpoint of the Ultimate Reality, verily exist. Hence it has been rightly said in the previous Kārikā that the mind is unattached.