Śrīmad-Bhāgavatam · Text 11.29.6
Who is speaking and story frame
नैवोपयन्त्यपचितिं कवयस्तवेश
ब्रह्मायुषापि कृतमृद्धमुद: स्मरन्त: ।
योऽन्तर्बहिस्तनुभृतामशुभं विधुन्वन्न
आचार्यचैत्त्यवपुषा स्वगतिं व्यनक्ति ॥ ६ ॥
naivopayanty apacitiṁ kavayas taveśa
brahmāyuṣāpi kṛtam ṛddha-mudaḥ smarantaḥ
yo ’ntar bahis tanu-bhṛtām aśubhaṁ vidhunvann
ācārya-caittya-vapuṣā sva-gatiṁ vyanakti
O my Lord! Transcendental poets and experts in spiritual science could not fully express their indebtedness to You, even if they were endowed with the prolonged lifetime of Brahmā, for You appear in two features — externally as the ācārya and internally as the Supersoul — to deliver the embodied living being by directing him how to come to You.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.