The puruṣa-avatāras are also explained in this connection. Mahā-Viṣṇu is the reservoir of all conditioned souls, but, as confirmed in the authoritative scriptures, Lord Kṛṣṇa is the ultimate fountainhead, the source of numerous plenary expansions, including Nārāyaṇa, who is generally accepted by Māyāvādī philosophers to be the Absolute Truth. The Lord's manifestation of prābhava and vaibhava expansions, as well as partial incarnations and incarnations with delegated powers, are also explained. Lord Kṛṣṇa's ages of boyhood and youth are discussed, and it is explained that His age at the beginning of youth is His eternal form.
The spiritual sky contains innumerable spiritual planets, the Vaikuṇṭhas, which are manifestations of the Supreme Lord's internal energy. Innumerable material universes are similarly exhibited by His external energy, and the living entities are manifested by His marginal energy. Because Lord Kṛṣṇa Caitanya is not different from Lord Kṛṣṇa, He is the cause of all causes; there is no cause beyond Him. He is eternal, and His form is spiritual. Lord Caitanya is directly the Supreme Lord, Kṛṣṇa, as the evidence of authoritative scriptures proves. This chapter stresses that a devotee who wishes to advance in Kṛṣṇa consciousness must have knowledge of Kṛṣṇa's personal form, His three principal energies, His pastimes and the relationship of the living entities with Him.