All the universes which appear only through Manas are no other than its modes. The mind is subjectively consciousness and objectively it is this universe. Hence, this all-pervading world is nothing but consciousness itself.

"Manah-kalpitam Jagat-(Creation of) world is an imagination of the mind" (Yogavasishtha). This legerdemain of the world is enacted by the mind and the mind alone- "Manomatram Jagat. What you call world is the mind only." Mind is world. The mind manifests itself as the external world. This universe is no other than the mind itself. Like a dream generating another dream in it, the mind, having no visible form, will generate non-existent visibles. This perishable universe exists only when the mind exists, but disappears with the absence of the latter. If the mind, which is the instrument of knowledge, perception and activity, vanishes, with it disappears this subjective world."

Sri Swami Sivananda