The material creation, mahat-tattva... Sa īkṣata. As it is said in the Vedic literature, simply by glancing over the material nature and agitating the three modes of material nature, the whole creation comes out. This is an sum, sum and substance of material creation. Mahā-Viṣṇu is lying in the Causal Ocean, Kāraṇārṇava, and He is breathing, and from His breathing innumerable universes are coming out. And in each and every universe, Mahā-Viṣṇu, in His further expansion as Garbhodakaśāyī-Viṣṇu, He enters. That Garbhodakaśāyī-Viṣṇu, from His abdomen there is a lotus stem, and in that lotus flower Lord Brahmā is born. In this way, creation is made.
So actually, Brahmā, Viṣṇu, Maheśvara, they are the principal directors of the three guṇas. Therefore Brahmā, Viṣṇu, Maheśvara, they are called guṇāvatāra. Lord Viṣṇu is in charge of sattva-guṇa activities. Therefore brāhmaṇa, the symbol of sattva-guṇa, they are Vaiṣṇavas. Formerly, in each and every home of a brāhmaṇa, there was Viṣṇu worship. A brāhmaṇa cannot worship any other demigods except Viṣṇu, because Viṣṇu is in the charge of the sattva-guṇa and brāhmaṇa is also in the sattva-guṇa. So Viṣṇu asya devatā. For this reason brāhmaṇa's another title is Vaiṣṇava. Brāhmaṇa-vaiṣṇava. Or brāhmaṇa-paṇḍita.