Nobody wants to follow the dictation of others—that is another independent nature of living entity—but when one voluntarily agrees to serve the dictation of the spiritual master . . . means to follow the dictation of Kṛṣṇa . . . Ācāryaṁ māṁ vijānīyāt. Kṛṣṇa says, "Ācārya is Myself." Nāvamanyeta karhicit: "Never disobey." Na martya-buddhyāsūyeta: "And do not think him as ordinary person and become envious of his position." Then there is falldown. Ācāryaṁ māṁ vijānīyān nāvamanyeta karhicit, na martya-buddhyāsūyeta (SB 11.17.27).
So this dictation of Kṛṣṇa comes through the disciplic succession, and if we follow the instruction of ācārya, or spiritual master, then we are directly following the orders of Kṛṣṇa, and thus I become a bhagavad-dūta. No more I am the dūta or the follower of the dictation of my senses. And one who is bhagavad-dūta, he is called gosvāmī, just like Rūpa Gosvāmī, Sanātana Gosvāmī. Those life is dedicated to follow the dictation of Kṛṣṇa, they are gosvāmī.