mama nābhyām abhūt padmaṁ
viśvākhyaṁ tatra cātma-bhūḥ
The Supreme Lord here describes His appearance in His transcendental pastime form of Śrī Nārāyaṇa. Lord Nārāyaṇa enters within the universe but does not give up His purely transcendental body of knowledge and bliss. Lord Brahmā, however, born from the Lord’s navel lotus, has a material body. Although Lord Brahmā is the most powerful mystic, his body, which pervades all material existence, is material, whereas the body of the Supreme Lord Hari, Nārāyaṇa, is always transcendental.