So that is explained in the Śrīmad-Bhāgavatam: janmādy asya yataḥ anvayād itarataś ca artheṣu abhijñaḥ (SB 1.1.1). Abhijñaḥ. This word is used. Abhijñaḥ means cognizant. Then if He is the origin of everything, how He got all knowledge perfectly? Therefore the next word is sva-rāṭ: He is fully independent. He doesn't require to take knowledge from anyone else. Otherwise how He can be origin? Sva-rāṭ. Muhyanti yat sūrayaḥ. That origin is so perfect, and still, sūrayaḥ, many scholars, many scientists, philosophers, they are also bewildered that, "How He can be a person?" Muhyanti yat sūrayaḥ. Tene brahma hṛdā ya ādi-kavaye muhyanti yat sūrayaḥ. These things are described.
So actually, if we want to have knowledge of everything, the source of knowledge is Vedas. And the essence of Veda is called Vedānta. And the descriptive explanation of Vedānta is the Śrīmad-Bhāgavatam: bhāṣyaṁ brahma-sūtrāṇām. Brahma-sūtra. Brahma-sūtra is the Vedānta philosophy. Kṛṣṇa has also referred to Brahma-sūtra: brahma-sūtra hetumadbhir viniścitaiḥ (BG 13.5). He recommends that hetumadbhir prasthāna. There are three prasthānas, and Brahma-sūtra is also prasthāna, the way of understanding. So Kṛṣṇa has recommended that "If you want to know things with reason and argument, then try to understand Vedānta-sūtra." Those who want to know the Absolute Truth through reasoning and argument, then one should study Vedānta-sūtra. But Vedānta-sūtra . . . sūtra means codes. Just like they have got code book. One word, it is meaning so many other things. Businessmen, they have got codes. When they send cable to their customer or to their principle, they use some codes. It saves so many words. So Brahma-sūtra. Sūtra means codes. So in that code also, require explanation. That explanation is Śrīmad-Bhāgavatam. Bhāṣyaṁ brahma-sūtrāṇām. Brahma-sūtrāṇām, the codes explained in the Brahma-sūtra, that is explained in the Śrīmad-Bhāgavatam.