bṛhad-vastu 'brahma' kahi--'śrī-bhagavān'
bṛhat-vastu—the substance, which is greater than the greatest; brahma—called by the name Brahman; kahi—we call; śrī-bhagavān—the Supreme Personality of Godhead; ṣaṭ—six; vidha—varieties; aiśvarya—opulences; pūrṇa—full; para-tattva—Absolute Truth; dhāma—reservoir.
"Brahman, who is greater than the greatest, is the Supreme Personality of Godhead. He is full of six opulences, and therefore He is the reservoir of ultimate truth and absolute knowledge.
In Śrīmad-Bhāgavatam it is said that the Absolute Truth is understood in three phases of realization: the impersonal Brahman, the localized Paramātmā and ultimately the Supreme Personality of Godhead. The impersonal Brahman and localized Paramātmā are expansions of the potency of the Supreme Personality of Godhead, who is complete in six opulences, namely, wealth, fame, strength, beauty, knowledge and renunciation. Since He possesses His six opulences, the Personality of Godhead is the ultimate truth in absolute knowledge.
Link to this page: https://prabhupadabooks.com/cc/adi/7/138