If you practice this yoga, keeping Kṛṣṇa in the center, always thinking of Kṛṣṇa, the form of the Kṛṣṇa, then it will be revealed. Yasya deve parā bhaktir yathā deve tathā gurau (ŚU 6.23). This is the yoga system of Kṛṣṇa consciousness.
So next verse He says:
- jñānaṁ te 'haṁ sa-vijñānam
- idaṁ vakṣyāmy aśeṣataḥ
- yaj jñātvā neha bhūyo 'nyaj
- jñātavyam avaśiṣyate
- (BG 7.2)
"I am speaking to you a process of knowledge, jñānam." Jñānam means knowledge. Te: "unto you." Ahaṁ sa-vijñānam. Sa-vijñānam means . . . jñānam is theoretical, and vijñānam means practical. Just like in scientific knowledge, the student has to pass both theoretical knowledge and practical knowledge. Theoretical . . . "Combination of this chemical and that chemical makes this chemical," this is theoretical knowledge. But when you mix these two chemicals or three chemicals and produce that object, that is practical.
Recently, I may say, in California University, one learned professor came there to speak about the evolutionary theory of chemicals, and he said that life is produced—perhaps you know—from four chemicals. But when one student, he said that, "If I supply these four chemicals, whether you can produce life?" in answer to this he said: "That I cannot say." That is imperfect knowledge. If you say: "Life is produced from chemicals," then you must make experimental demonstration: by mixing those chemicals you produce life. That is called vijñānam, practical demonstration. Otherwise it is not perfect. Scientific knowledge means observation, then experiment. If you fail in your experiment, that is not scientific knowledge. It must be experimented.
So here also it is said, jñānaṁ te 'haṁ sa-vijñānam: "I am speaking to you this knowledge, which you can practically experience." Not theoretical simply. Jñānaṁ te 'haṁ sa-vijñānam idaṁ vakṣyāmy aśeṣataḥ (BG 7.2). Aśeṣataḥ means "without any reservation, as far as possible." "As far as you can understand, I am explaining." Yaj jñātvā, "If you understand this," na iha bhūyaḥ anyaj jñātavayam avaśiṣyate . . . "If you can understand this knowledge with practical experience, then there will be nothing to know any more." That means your knowledge is complete, perfect.
In the Vedas also, it is stated that yaj jñātvā . . . yasmin vijñāte sarvam idaṁ vijñātaṁ bhavati (Muṇḍaka Upaniṣad 1.3). If you simply try to understand what is God . . . not try to understand. If you understand scientifically what is God, then you understand everything. Because God is everything. God is the central point of everything. Yato vā imāni bhūtāni jāyante (Taittirīya Upaniṣad 3.1). These are the Vedic version. "From whom all these material cosmic manifestation has come into being." In the Vedānta-sūtra it is said, janmādy asya yataḥ (SB 1.1.1): the Absolute Truth is that from which everything has come down. So if you understand the Absolute Truth, yasmin vijñāte, sarvam idaṁ vijñātaṁ bhavati, then you can understand all other departments of knowledge. Therefore Kṛṣṇa says that jñānaṁ te 'haṁ sa-vijñānam idaṁ vakṣyāmy aśeṣataḥ: "Explicitly, elaborately I am saying." Yaj jñātvā, "If you understand," na iha, "in this world," anyat bhūyaḥ, "again," anyat, "anything else," jñātavyam avaśiṣyate, "there is anything remains to understand. Everything is understood."