When someone perceives that all the variety in the world — so many colors, forms, species, temperaments — rests in a single source, and that the entire manifold creation has expanded from that one source, then that person attains Brahman.
An ocean contains countless waves. Each wave looks different — small, large, calm, turbulent. But every wave is water, and every wave belongs to the same sea. Seeing unity in diversity is not just an intellectual position. It is an experience that transforms the one who has it.