Text 21]
Yamarāja Instructs His Messengers
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and love for Him, is uncontaminated by the material modes of nature. It is very confidential and difficult for ordinary human beings to understand, but if by chance one fortunately understands it, he is immediately liberated, and thus he returns home, back to Godhead.
PURPORT
In  Bhagavad-gītā  Lord Kṛṣṇa refers to  bhāgavata-dharma  as the most confidential religious principle ( sarva-guhyatamam, guhyād guhyataram ). Kṛṣṇa says to Arjuna, “Because you are My very dear friend, I am explaining to you the most confidential religion.”  Sarva-dharmān parityajya mām ekaṁ śaraṇaṁ vraja : “Give up all other duties and surrender unto Me.” One may ask, “If this principle is very rarely understood, what is the use of it?” In answer, Yamarāja states herein that this religious principle is understandable if one follows the  paramparā  system of Lord Brahmā, Lord Śiva, the four Kumāras and the other standard authorities. There are four lines of disciplic succession: one from Lord Brahmā, one from Lord Śiva, one from Lakṣmī, the goddess of fortune, and one from the Kumāras. The disciplic succession from Lord Brahmā is called the Brahma-sampradāya, the succession from Lord Śiva (Śambhu) is called the Rudra-sampradāya, the one from the goddess of fortune, Lakṣmījī, is called the Śrī-sampradāya, and the one from the Kumāras is called the Kumāra-sampradāya. One must take shelter of one of these four  sampradāyas  in order to understand the most confidential religious system. In the  Padma Purāṇa  it is said,  sampradāya-vihīnā ye mantrās te niṣphalā matāḥ : If one does not follow the four recognized disciplic successions, his  mantra  or initiation is useless. In the present day there are many  apasampradāyas , or  sampradāyas  which are not bona fide, which have no link to authorities like Lord Brahmā, Lord Śiva, the Kumāras or Lakṣmī. People are misguided by such  sampradāyas . The  śāstras  say that being initiated in such a  sampradāya  is a useless waste of time, for it will never enable one to understand the real religious principles.
TEXT 22
एतावानेव लोकेऽस्मिन् पुंसां धर्मः परः स्मृतः।
भक्तियोगो भगवति तन्नामग्रहणादिभिः ॥२२॥