Arjuna was advised to receive transcendental knowledge from the realized person by surrender, questions and service. Receiving transcendental knowledge is not like exchanging dollars; such knowledge has to be received by service to the spiritual master. As Brahmaji received the knowledge directly from the Lord by satisfying Him fully, similarly one has to receive the transcendental knowledge from the spiritual master by satisfying him. The spiritual master's satisfaction is the means of assimilating transcendental knowledge. One cannot understand transcendental knowledge simply by becoming a grammarian. The Vedas declare (Svetasvatara Upanisad 6.23):

"Only unto one who has unflinching devotion to the Lord and to the spiritual master does transcendental knowledge become automatically revealed." Such relationship between the disciple and the spiritual master is eternal. One who is now the disciple is the next spiritual master. And one cannot be a bona fide and authorized spiritual master unless one has been strictly obedient to his spiritual master. Brahmaji, as a disciple of the Supreme Lord, received the real knowledge and imparted it to his dear disciple Narada, and similarly Narada, as spiritual master, handed over this knowledge to Vyasa and so on. Therefore the so-called formal spiritual master and disciple are not facsimiles of Brahma and Narada or Narada and Vyasa. The relationship between Brahma and Narada is reality, while the so-called formality is the relation between the cheater and cheated. It is clearly mentioned herewith that Narada is not only well behaved, meek and obedient, but also self-controlled. One who is not self-controlled, specifically in sex life, can become neither a disciple nor a spiritual master. One must have disciplinary training in controlling speaking, anger, the tongue, the mind, the belly and the genitals. One who has controlled the particular senses mentioned above is called a gosvami. Without becoming a gosvami one can become neither a disciple nor a spiritual master. The so-called spiritual master without sense control is certainly the cheater, and the disciple of such a so-called spiritual master is the cheated.