Brahma-vidyā: Satya–Tapas and the Enumeration of Tattvas
Arjuna–Vāsudeva framed dialogue
कथं कर्म क्रियात् साधु कथं मुच्येत किल्बिषात् । के नो मार्गा: शिवाश्र स्यु: कि सत्यं कि च दुष्कृतम्,'श्रेष्ठ कर्म किस प्रकार करना चाहिये? मनुष्य पापसे किस प्रकार छूटता है? कौन-से मार्ग हमारे लिये कल्याणकारक हैं? सत्य क्या है? और पाप क्या है?
kathaṁ karma kriyāt sādhu kathaṁ mucyeta kilbiṣāt | ke no mārgāḥ śivāśrasyuḥ ki satyaṁ ki ca duṣkṛtam ||
Vāyu-deva said: “How should one perform action rightly? How does a person become freed from sin? Which paths are auspicious and welfare-bringing for us? What is truth, and what is wrongdoing?”
वायुदेव उवाच
The verse frames a classic dharma-inquiry: right performance of action (karma), release from moral fault (kilbiṣa), identification of auspicious life-paths (śiva-mārga), and discernment between truth (satya) and wrongdoing (duṣkṛta). It sets up ethical discrimination and disciplined conduct as the means to purification and welfare.
In the Ashvamedhika Parva, Vāyu-deva speaks in a questioning mode, seeking clarification on proper conduct and moral categories—how to act well, how sin is removed, which ways are beneficial, and how to distinguish truth from evil—thereby prompting an ensuing instruction on dharma.