Jñāna, this knowledge, most confidential knowledge, it is not sentiment. Vijñāna-sahitam. It is science. Just like in scientific knowledge you must know theoretically and practically. Not only that, you simply know that so much oxygen, so much hydrogen produces water by mixing. . . That is theoretical. You have to make water by mixing these two chemicals—that is practical. So in the B.Sc examination they take examination, test, theoretical and practical. So theoretical is. . . Kṛṣṇa says, sarva-dharmān parityajya mām ekaṁ śaraṇaṁ vraja (BG 18.66). But when you really surrender, that is practical science. That is practical. If you decide to surrender—that is called śaraṇāgati—then you have to learn the science how to become surrendered. That is vijñāna. Jñāna means theoretical knowledge, and vijñāna means practical knowledge. So you have to do it practically, not that "I have read Bhagavad-gītā and Bhāgavata, so I have become a devotee." No. You should practically demonstrate in your life that you are actually devotee. That is called vijñāna-sahitam. Jñānaṁ vijñāna-sahitam. And yaj jñātvā. If you learn this science, yaj jñātvā mokṣyase aśubhāt, the result is you become liberated from this aśubha, inauspicious condition of life, aśubha.
What is that inauspicious condition of life? This materialistic life. If you want to get out of this materialistic way. . . This is aśubha. There is no śubha. People are thinking, "We shall make it śubha." Śubha means auspicious by material adjustment, by having nice car, nice road, skyscraper building and so many machine and bodily comforts, which is known as material advancement.