Pradyumna: Translation: "Let me offer my respectful obeisances unto him (Śuka), the spiritual master of all sages, the son of Vyāsadeva, who, out of his great compassion for those gross materialists who struggle to cross over the darkest regions of material existence, spoke this Purāṇa, supplement to the Vedas, the cream of Vedic knowledge, after having personally assimilated it by experience."
Prabhupāda: So these are the qualifications of the spiritual master. What is that? Svānubhāvam, "must assimilate personally." Svānubhāvam akhila-śruti-sāram. Śruti. The Vedas are called śruti, absolute knowledge. It has to be learned by hearing, not by speculation. Śruti. Tad-vijñānārthaṁ sa gurum evābhigacchet śrotriyam (MU 1.2.12). From śruti, the śrotriya comes. So he's offering respect to Śukadeva Gosvāmī because he has assimilated the whole Vedic knowledge. Śruti-sāra. What is that sāra? Sāra means essence. What is the ultimate goal of knowledge, essence of knowledge? This is also explained in Bhagavad-gītā: vedaiś ca sarvair aham eva vedyaḥ (BG 15.15). The real purpose of Vedic knowledge is to search out where is Kṛṣṇa.