Mind as Charioteer; Kṣetrajña, Tapas, and Dhyāna-Yoga
Adhyātma-Upadeśa
शब्दस्पर्शीं च विज्ञेयौ द्विगुणो वायुरुच्यते
śabdasparśīṃ ca vijñeyau dviguṇo vāyur ucyate
Vāyu-deva said: “Sound and touch are to be understood as its (proper) qualities; therefore the Wind is spoken of as ‘twofold’—bearing these two sensory properties.”
वायुदेव उवाच
The verse teaches an elemental doctrine: the air principle (vāyu) is characterized by two perceptible qualities—sound and touch—so it is termed ‘twofold’ (dviguṇa). This frames knowledge of the world through discernible properties rather than mere names.
Vāyu-deva is delivering a didactic explanation about the nature of the elements and their defining sensory qualities, classifying vāyu by the properties it carries (sound and touch).