Śrīmad-Bhāgavatam · Text 1.2.20
Who is speaking and story frame
एवं प्रसन्नमनसो भगवद्भक्तियोगत: ।
भगवत्तत्त्वविज्ञानं मुक्तसङ्गस्य जायते ॥ २० ॥
evaṁ prasanna-manaso
bhagavad-bhakti-yogataḥ
bhagavat-tattva-vijñānaṁ
mukta-saṅgasya jāyate
Thus established in the mode of unalloyed goodness, the man whose mind has been enlivened by contact with devotional service to the Lord gains positive scientific knowledge of the Personality of Godhead in the stage of liberation from all material association.
Read Śrīla Prabhupāda's purport on Vedabase.io