The Yoga of Liberation by Renunciation

This verse explains how Sanjaya received the knowledge: by the grace of Vyasa, I have heard this supreme secret yoga directly from the Lord of yoga, Krishna, speaking it Himself (vyāsa-prasādāc chrutavān etad guhyam ahaṁ param yogaṁ yogeśvarāt kṛṣṇāt sākṣāt kathayataḥ svayam). This reveals how Sanjaya received the divine vision to see and hear the conversation between Krishna and Arjuna. It was through the grace of Vyasa (the sage who compiled the Mahabharata) that Sanjaya was granted this ability. Sanjaya heard this supreme secret yoga directly from Krishna Himself, the Lord of yoga. This emphasizes the divine nature of the teaching and the special privilege of receiving it directly. When you understand this, you realize: you don't receive this teaching by your own effort alone. You receive it by grace, directly from the Lord of yoga Himself. This is the path: recognizing the teaching as received by grace, directly from the Supreme.