When he (Sanat-kumara) was questioned by Sankhyayana Rsi, he spoke to him the same message he had heard from Lord Sankarsana. In other words, unless one hears from the proper authority one cannot become a preacher

Expressions researched:
"when he was questioned by Sāṅkhyāyana Ṛṣi, he spoke to him the same message he had heard from Lord Saṅkarṣaṇa. In other words, unless one hears from the proper authority one cannot become a preacher"

Srimad-Bhagavatam

SB Canto 3

This is the way of the paramparā system. Although Sanat-kumāra, the well-known great saintly Kumāra, was in the perfect stage of life, still he heard the message of Śrīmad-Bhāgavatam from Lord Saṅkarṣaṇa. Similarly, when he was questioned by Sāṅkhyāyana Ṛṣi, he spoke to him the same message he had heard from Lord Saṅkarṣaṇa. In other words, unless one hears from the proper authority one cannot become a preacher. In devotional service, therefore, two items out of the nine, namely hearing and chanting, are most important. Without hearing nicely, one cannot preach the message of Vedic knowledge.

SB 3.8.7, Translation and Purport

Lord Saṅkarṣaṇa thus spoke the purport of Śrīmad-Bhāgavatam to the great sage Sanat-kumāra, who had already taken the vow of renunciation. Sanat-kumāra also, in his turn, when inquired of by Sāṅkhyāyana Muni, explained Śrīmad-Bhāgavatam as he had heard it from Saṅkarṣaṇa.

This is the way of the paramparā system. Although Sanat-kumāra, the well-known great saintly Kumāra, was in the perfect stage of life, still he heard the message of Śrīmad-Bhāgavatam from Lord Saṅkarṣaṇa. Similarly, when he was questioned by Sāṅkhyāyana Ṛṣi, he spoke to him the same message he had heard from Lord Saṅkarṣaṇa. In other words, unless one hears from the proper authority one cannot become a preacher. In devotional service, therefore, two items out of the nine, namely hearing and chanting, are most important. Without hearing nicely, one cannot preach the message of Vedic knowledge.