He (Brahma) is certainly the supreme teacher of this universe

Expressions researched:
"He is certainly the supreme teacher of this universe"

Krsna, The Supreme Personality of Godhead

Lord Brahmā realized his actual position. He is certainly the supreme teacher of this universe, in charge of the production of material nature... Under these circumstances, although Lord Brahmā is the supreme creature within this universe, what is his importance in the presence of Lord Kṛṣṇa?

Krsna Book 14:

Lord Brahmā realized his actual position. He is certainly the supreme teacher of this universe, in charge of the production of material nature, consisting of the complete material energy, false ego, sky, air, fire, water and earth. Such a universe may be gigantic, but it can be measured, just as we measure our body as seven spans. Generally everyone's personal bodily measurement is calculated to be seven spans of his hand. This particular universe may appear as a very gigantic body, but it is nothing but the measurement of seven spans for Lord Brahmā. Aside from this universe, there are unlimited other universes which are outside the jurisdiction of this particular Lord Brahmā. Just as innumerable atomic infinitesimal fragments pass through the holes of a screened window, so millions and trillions of universes in their seedling form are coming out from the bodily pores of Mahā-Viṣṇu, and that Mahā-Viṣṇu is but a part of a part of the plenary expansion of Kṛṣṇa. Under these circumstances, although Lord Brahmā is the supreme creature within this universe, what is his importance in the presence of Lord Kṛṣṇa?

Lord Brahmā therefore compared himself to a little child within the womb of his mother. If the child within the womb plays with his hands and legs, and while playing touches the body of the mother, is the mother offended with the child? Of course she isn’t. Similarly, Lord Brahmā may be a very great personality, and yet not only Brahmā but everything that be is existing within the womb of the Supreme Personality of Godhead. The Lord's energy is all-pervading: there is no place in the creation where it is not acting. Since everything is existing within the energy of the Lord, the Brahmā of this universe and the Brahmās of the many other millions and trillions of universes are existing within the energy of the Lord; therefore the Lord is considered to be the mother, and everything existing within the womb of the mother is considered to be the child. And the good mother is never offended with the child, even if he touches the body of the mother by kicking his legs.