In Gauḍīya Vaishnavism, a school of Vaiṣṇavism, the Sātvata-tantra describes three different forms, or aspects, of Vishnu as Mahavishnu, Garbhodakśayī-Viṣṇu and Kṣīrodakaśāyī Vishnu. Kṣīrodakaśāyī-Viṣṇu resides in the heart of every living creature as a four hand expansion similar to that of Mahāviṣṇu. He is also referred to as Paramātmā or super soul. His abode is the Vaikuṇṭha. His personal abode is Kshirasagara (Milk Ocean) and He is realised as Aniruddha expansion of Nārāyaņa.
The Viṣṇu or the Deity of the quality of goodness in the material world is the puruṣāvatāra known as Kṣīrodakaśāyī Viṣṇu or Paramātmā.
- A.C. Bhaktivedanta Svamī Prabhupāda. The Quest for Enlightenment. Los Angeles. Hard Cover 1997