prāṇena mukhyena patiḥ prajānām
cittasya cittair mana-indriyāṇāṁ
patir mahān bhūta-guṇāśayeśaḥ
In this verse it is clearly indicated that the original source of everything is life. Brahmā was instructed by the supreme life, Kṛṣṇa. Kṛṣṇa is the supreme living entity (nityo nityānāṁ cetanaś cetanānām), and Brahmā is also a living entity, but the original source of Brahmā is Kṛṣṇa. Therefore Kṛṣṇa says in Bhagavad-gītā (7.7), mattaḥ parataraṁ nānyat kiñcid asti dhanañjaya: “O Arjuna, there is no truth superior to Me.” Kṛṣṇa is the original source of Brahmā, who is the original source of this universe. Brahmā is a representative of Kṛṣṇa, and therefore all the qualities and activities of Kṛṣṇa are also present in Lord Brahmā.