Kṛṣṇa says that, "Anyone who can understand Me, about Me." Not "about Me," but "about Me." We can understand Kṛṣṇa by His activities, something about Him. Otherwise, He has immense potencies. It is impossible for us to understand. Parāsya śaktir vividhaiva śrūyate (Śvetāśvatara Upaniṣad 6.8, Cc. Madhya 13.65, purport). There is unlimited energies of Kṛṣṇa; therefore He is called acintya-śakti. Acintya-guṇa.
Acintya-śakti, "which is inconceivable." But anyone, if he somehow or other, according to his capacity, tries to understand in truth, then he becomes immediately liberated so that after quitting this body, he doesn't have to come again in this material world. Then where does he go? Tyaktvā dehaṁ punar janma naiti mām eti (BG 4.9): "He comes to Me."
Therefore Kṛṣṇa knowledge is so perfect. And if we take the real process, śravaṇaṁ kīrtanaṁ viṣṇoḥ smaraṇaṁ pāda-sevanam (SB 7.5.23), the devotional service . . . because Kṛṣṇa says, bhaktyā mām abhijānāti yāvān yaś cāsmi tattvataḥ (BG 18.55). Here . . . in the Fourth Chapter, He says that yo jānāti māṁ tattvataḥ. Now here, in the Seventh Chapter also, Kṛṣṇa says again: tattvataḥ. The tattvataḥ word is very much used about understanding Kṛṣṇa. Not superficially, but in truth one has to understand.
But that is very difficult. That Kṛṣṇa says here: manuṣyāṇāṁ sahasreṣu kaścid yatati siddhaye (BG 7.3). This is the business of this human form of life, to . . . this is a chance to make our life successful, siddhaye. Siddhaye means to become successful. And what is that success? That success . . .