Brahmopadeśa on Saṃnyāsa, Tapas, and Jñāna (ब्रह्मोपदेशः—संन्यासतपोज्ञानविमर्शः)
अव्यक्तयोनिप्रभवो बुद्धिस्कन्धमयो महान् | महाहंकारविटप इन्द्रियाडुकुरकोटर:
avyaktayoniprabhavo buddhiskandhamayo mahān | mahāhaṃkāraviṭapa indriyāḍukurakoṭaraḥ
Vāyu-deva dit : «Cet arbre (cosmique) puissant naît d’une source non manifestée ; son tronc est fait d’intellect (buddhi). Sa grande branche est le sentiment du “moi” (ahaṃkāra), et ses creux et cavités sont les organes des sens.»
वायुदेव उवाच
The verse maps inner psychology and cosmology onto a ‘tree’ structure: the unmanifest is the root-source, intellect is the stabilizing trunk, ego-sense is a major branching principle, and the sense-faculties are the hollows through which experience flows. Ethically, it points toward discerning these components, loosening identification with ego and senses, and cultivating discriminative wisdom (buddhi) as a basis for restraint and liberation-oriented conduct.
Vāyu-deva is explaining a doctrinal model of embodied existence using a metaphorical tree. He identifies successive principles—unmanifest source, intellect, ego-sense, and the sense-organs—so the listener can understand how experience and bondage arise through the mind-sense complex.