Kosmos, universe, Mind, world, these are terms often to used to suggest the sum total of everything, every object, the all. These point to the vast realm of differentiated consciousness, or all the forms that might become objects of consciousness.
Pure undifferentiated Consciousness is not normally considered to exist. Not so long ago a professor of philosophy scoffed at the idea of consciousness without an object. All consciousness has an object. This is not the same as all triangles have three sides. But it is a kind of axiom. But like the parallel axiom.
Now awareness is always busy in the waking state traveling from one form to another. From the taste of an orange to the sound of a dog barking to a thought of tomorrow or a memory of yesterday to feelings and sensations. With luck to some higher experience of deep feeling or a superconscious realization. In sleep it travels into dream worlds,
When awareness over time probes the question of 'who am I' and seriously pursues the answer it eventually becomes aware only of itself and then dissolves into its Source of Pure Undifferentiated Consciousness!! Though this is brief from an outer point of view this timeless event so effects awareness that it is transformed, and as it travels back to normal consciousness it knows something very special. Namely, that the Mind is not the whole show. In fact that the Mind or Universe can be transcended.
We can say Great Space and objects, or Brahman and Maya; or Siva and Sakti. One experience of nirvikalpa samadhi is however not usually enough to wean the awareness completely from its old haunts. It may take years for the vasanas or dynamic impulses to quiet down and allow for total Realization to occur.