Vijṣāna means perfect knowledge. What is that perfect knowledge? Perfect knowledge means to know Kṛṣṇa. Yasmin vijṣāte sarvam evaṁ vijṣātaṁ bhavati (Muṇḍaka Upaniṣad 1.3). The Vedic injunction is, "If you can understand the Supreme, then you understand the whole thing, because Supreme is the whole, absolute." Just like if you can understand one, two, three, four, five, six . . . eight, nine, zero, then you can understand the whole mathematics, because what is mathematics? One, two, three, four, three, four, one, two, just like that. That's all. The same nine figures, that's all.
Similarly, the Vedas says, yasmin vijṣāte sarvam evaṁ vijṣātaṁ bhavati (Muṇḍaka Upaniṣad 1.3). If you simply try to understand the Supreme Absolute Truth, that is the purpose of Vedas. And it is confirmed in the Bhagavad-gītā also, vedaiś ca sarvair aham eva vedyam (BG 15.15). What is the use of studying Vedas? What is the use of studying this Bhāgavata or . . .? To understand Kṛṣṇa. That's all.
So here it is stated that maunaṁ vijṣānaṁ santoṣa. Santoṣa. This is the result. If you are perfect in knowledge of Kṛṣṇa, then you are satisfied. Satisfied. Yasmin sthito guruṇāpi duḥkhena na vicālyate.