CC Madhya 6.139
sei brahma — bṛhad-vastu, īśvara-lakṣaṇa
“All the Vedas and literature that strictly follows the Vedic principles explain that the Supreme Brahman is the Absolute Truth, the greatest of all, and a feature of the Supreme Lord.
The greatest of everything is Śrī Kṛṣṇa. Lord Kṛṣṇa states in the Bhagavad-gītā (15.15), vedaiś ca sarvair aham eva vedyaḥ: “By all the Vedas, I am to be known.” In Śrīmad-Bhāgavatam (1.2.11) it is said that the Absolute Truth is understood in three phases — namely, Brahman, Paramātmā and Bhagavān, the Supreme Personality of Godhead (brahmeti paramātmeti bhagavān iti śabdyate). Thus the Supreme Personality of Godhead is the last word in understanding the Absolute Truth, Brahman.