Verse 2.18

Sanskrit text and transliteration:

कोशप्रत्यक्प्रवेशेन पूर्वपूर्वप्रहाणतः ।
कारकादिनिषेधेन ह्युपायो ब्रह्मवेदने ॥ १८ ॥

kośapratyakpraveśena pūrvapūrvaprahāṇataḥ |
kārakādiniṣedhena hyupāyo brahmavedane || 18 ||

English translation of verse 2.18:

The means of knowing Brahman consists, indeed, in abandoning one after another (the different sheaths such as the annamayakośa), in rejecting the instruments of action, etc., and in passing through the sheaths inside.

Notes:

One must give up action, the instruments of action, etc., which involve duality, and proceed inward to the Self by rejecting annamayakośa, prāṇamaya-kośa, etc., as not-Self.