Justifying in four verses why the behavior mentioned in the previous verse is apt, Arjun uses the words
kasmāchcha tena
, meaning “why should they not.” Why shouldn’t all living beings offer their humble respects to the Supreme Lord, when the entire creation emanates from him, is sustained by him, and shall merge back into him? He is everything that is manifest in creation because it is all his energy. He is also everything that remains unmanifest because it is his latent energy. And yet he is beyond both the manifest and the unmanifest because he is the Supreme Energetic—the source and Supreme Master of all the energies. Hence, neither the material energy nor the souls can ever do anything to impact his personality, which is transcendental to both.
Arjun specifically mentions that Shree Krishna is greater than the secondary creator Brahma because Brahma is the senior most in the universe. All living beings are either Brahma’s progeny, or the descendants of his progeny. However, Brahma himself was born from a lotus that grew from the navel of Lord Vishnu, who is an expansion of Shree Krishna. Thus, while Brahma is considered as the senior most grandsire of the world, Shree Krishna is Brahma’s Grandsire. It is thus apt that Brahma should bow to him.