So we should hear from the sampradāya-ācārya by disciplic succession. As Kṛṣṇa recommends in this Bhagavad-gītā: evaṁ paramparā-prāptam imaṁ rājarṣayo viduḥ (BG 4.2).
- imaṁ vivasvate yogaṁ
- proktavān aham avyayam
- vivasvān manave prāha
- manur ikṣvākave 'bravīt
- (BG 4.1)
Evaṁ paramparā-prāptam imaṁ rājarṣayo viduḥ (BG 4.2). So that is the system. We should receive knowledge by the bona fide, paramparā system. Otherwise it may be bogus. Because without paramparā system, we cannot understand actual fact. And we have to become in the disciplic succession. We must accept a guru. Tasmād guruṁ prapadyeta jijñāsuḥ śreya uttamam (SB 11.3.21). If you are actually eager, anxious to understand the spiritual science, then you must approach a guru. Tasmād guruṁ prapadyeta jijñāsuḥ śreya uttamam. Uttama means transcendental subject matter. You cannot learn it. Just like if you purchase one pharmacology book from the bookseller's shop, and if you read, at home, do you mean that you become a medical practitioner, pharmacist? No. You must go to the university, you must go to the college. You must hear the experienced professor and learn it and practically experiment it. Then you can learn. Not that by purchasing a book you become a medical practitioner or lawyer. That is not possible.