The word advayam, meaning "one without a second," is also significant. Because Brahmā was overcast by Kṛṣṇa's māyā, he was thinking himself the Supreme. In the material world, everyone thinks, "I am the best man in this world. I know everything." One thinks, "Why should I read Bhagavad-gītā? I know everything. I have my own interpretation." Brahmā, however, was able to understand that the Supreme Personality is Kṛṣṇa. Īśvaraḥ paramaḥ kṛṣṇaḥ (Bs. 5.1). Another of Kṛṣṇa's names, therefore, is parameśvara.
Now Brahmā saw Kṛṣṇa, the Supreme Personality of Godhead, appearing as a cowherd boy in Vṛndāvana, not demonstrating His opulence but standing just like an innocent boy with some food in His hand, loitering with His cowherd boyfriends, calves and cows. Brahmā did not see Kṛṣṇa as catur-bhuja, the opulent Nārāyaṇa; rather, he simply saw an innocent boy. Nonetheless, he could understand that although Kṛṣṇa was not demonstrating His power, He was the same Supreme person. people generally do not appreciate someone unless he shows something wonderful, but here, although Kṛṣṇa did not manifest anything wonderful, Brahmā could understand that the same wonderful person was present like an ordinary child, although He was the master of the whole creation.