Shloka 47
Mind as Charioteer; Kṣetrajña, Tapas, and Dhyāna-Yoga
Adhyātma-Upadeśa
हस्व॑ दीर्घ कृशं स्थूलं चतुरस््र तु वृत्तवत् । एवं द्वादशविस्तारं तेजसो रूपमुच्यते
hrasvaṁ dīrghaṁ kṛśaṁ sthūlaṁ caturasraṁ tu vṛttavat | evaṁ dvādaśa-vistāraṁ tejaso rūpam ucyate ||
风神伐由说道：“所谓‘提阇斯’（tejas，光辉之能）的形相，被说为有十二种伸展之态：或短或长，或细或粗，或方或圆。正因这些不同的尺度与形状，人们才得以言说‘提阇斯’的本性。”
वायुदेव उवाच
Educational Q&A
The verse teaches that ‘tejas’ (radiant/fire-like energy) is not confined to a single visible shape; it is understood through multiple modes of extension—contrasting dimensions (short/long, thin/thick) and geometries (square/round)—indicating a many-sided, descriptive approach to subtle principles.
Vāyu is speaking in an explanatory, instructional passage, defining how the form of ‘tejas’ is characterized. The focus is not on action but on doctrinal description—classifying the appearances or dimensions by which tejas is recognized.