Mind as Charioteer; Kṣetrajña, Tapas, and Dhyāna-Yoga
Adhyātma-Upadeśa
बीजधर्म तथाव्यक्तं प्रसवात्मकमेव च । बीजधर्मा महानात्मा प्रसवश्चेति नः श्रुतम्,अव्यक्त प्रकृति कारणरूपा भी है और कार्यरूपा भी। इसी प्रकार महत्तत्त्वके भी कारण और कार्य दोनों ही स्वरूप सुने गये हैं
bījadharma tathāvyaktaṃ prasavātmakam eva ca | bījadharmā mahānātmā prasavaś ceti naḥ śrutam |
Vāyu said: “The Unmanifest (Avyakta) is spoken of as having the nature of a seed and as being productive—bringing forth creation. Likewise, the Great Principle (Mahat) too is heard of as both seed-like (a causal ground) and as ‘production’ (an effect that further generates).”
वायुदेव उवाच
The verse presents a causal chain in which the Unmanifest (Avyakta) and the Great Principle (Mahat) are each described as both cause (seed-like ground) and effect (a produced stage that itself produces further evolutes). It emphasizes layered causality: what is ‘born’ can still function as a ‘seed’ for what follows.
Vāyudeva is instructing the listener in a philosophical exposition (Sāṅkhya-like) about the origins of manifestation, explaining how Avyakta and Mahat are traditionally understood as simultaneously causal and productive principles within the unfolding of creation.