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That Mahā-Viṣṇu who lies on the Causal Ocean is actually an expansion of Balarāma, who is Kṛṣṇa's first expansion, and, in the Vṛndāvana pastimes, is the brother of Kṛṣṇa. In the  mahā-mantra  Hare Kṛṣṇa, Hare Kṛṣṇa, Kṛṣṇa Kṛṣṇa, Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare, the word Rāma refers to Balarāma. Since Nityānanda is an expansion of Balarāma, Rāma also refers to Lord Nityānanda. Thus Hare Kṛṣṇa, Hare Rāma addresses not only Kṛṣṇa and Balarāma but Lord Caitanya and Nityānanda as well.
The subject matter of  Caitanya-caritāmṛta  primarily deals with what is beyond this material creation. The cosmic material expansion is called  māyā  because it has no eternal existence. Because it is sometimes manifested and sometimes not manifested, it is regarded as illusory. But beyond this temporary manifestation there is a higher nature, as indicated in  Bhagavad-gītā :
paras tasmāt tu bhāvo 'nyo  
 'vyakto 'vyaktāt sanātanaḥ  
 yaḥ sa sarveṣu bhūteṣu  
 naśyatsu na vinaśyati
“Yet there is another nature, which is eternal and is transcendental to this manifested and unmanifested matter. It is supreme and is never annihilated. When all in this world is annihilated, that part remains as it is.” (Bg. 8.20)
That supreme nature is beyond the manifested ( vyaktaḥ ) and unmanifested ( avyaktaḥ ). This superior nature which is beyond both creation and annihilation is the living force which is manifest in the bodies of all living entities. The body itself is composed of inferior nature, matter, but it is the superior nature that is moving the body. The symptom of that superior nature is consciousness. Thus in the spiritual world, where everything is composed of the superior nature, everything is conscious. In the material world inanimate objects are not conscious, but in the spiritual world this is not so. There a table is conscious, the land is conscious, the trees are conscious—everything is conscious.
It is not possible to imagine how far this material manifestation extends. In the material world everything is calculated by imagination or by some imperfect method, but Vedic literatures give information of what lies beyond the material universe. Those who believe in experimental knowledge may doubt the Vedic conclusions, for they cannot even calculate how far this universe is extended, nor can they reach far into the universe itself. It is not possible to obtain information of anything beyond this material nature by experimental means. That which is beyond our power of conception is called  acintya , inconceivable. It is useless to argue or speculate about what is inconceivable. If it is truly inconceivable, it is not subject to speculation or experimentation. Our energy is limited, and our sense perception is limited; therefore we must rely on the Vedic conclusions regarding that subject matter which is inconceivable. Knowledge of the superior nature must simply be accepted without argument. How is it possible to argue about something to which we have no access? The method for understanding transcendental subject matter is