śuddha-sattva-mūrti prabhu dharena karunāyaye-vigrahe sabāra prakāśa sulīlāya
His form is completely spiritual, and He manifests it only by His mercy. All the activities in this material world are conducted within His form.
“The word śuddha-sattva in this verse refers to Śrī Baladeva, who is the predominating Deity of the sandhini energy, which is one of the three internal potencies. All the ingredients of the spiritual world emanate from Baladeva. In other words, śuddha- sattva, or pure goodness, which is beyond the three modes of material nature, emanates from Him. In other words, He is the cause of spiritual existence. All of Lord Vişnu’s various forms are His plenary portions or portions of His plenary portions, and They are all forms of pure goodness.In the Srimad Bhagavatam (4:3:23) Lord Śiva speaks to Satī as follows: “1 am always engaged in offering obeisances to Lord Vasudeva in pure Krsna consciousness. Krsna consciousness is always pure consciousness, in which the Supreme Personality of Godhead, known as Vasudeva, is revealed without any covering.” In their commentaries on this verse: (1) Śrīla Jīva Gosvāmī says, “The word viśuddha indicates a complete absence of material influence because of being sheltered by the Lord’s svarūpa- śakti;” (2) Śrīla Viśvanātha Cakravarti Thakura says, “The word viśuddha indicates that it is spiritual, being composed of the cit-śakti; and (3) Śrīla Śrīdhara Svāmī says, “Sattva refers to the consciousness, or the level of pure sattva.” In his commentary on Śrīmad Bhagavatam (1:2:24) he says: “Sattva refers to direct perception of Brahman.” And in his commentary on the words viśuddham sattvam ūrjitam from the Srimad Bhagavatam (1:3:3), he says: “Viśuddha indicates ‘untouched by the gunas’ and ürjitam means ‘unsurpassed.” In his Śrī Bhagavata-tātparya, Śrī Madhvācārya says: “Sattva refers to the possession of saintly qualities, knowledge, strength, and attractive form.” In the Matsya Purana it is stated: “Sattva refers to the totality of all strength and knowledge.” Another name for the state of pure goodness is vasudeva. One who appears in that state is called Vasudeva.It is stated in the Caitanya-caritāmṛta (Adi 4:64-65): “The essential portion of the sandhini potency is śuddha-sattva. Lord Krsna’s existence rests upon it. Krsna’s mother, father, abode, house, bedding, seats, and so on are all transformations of suddha-sattva.” Again, in the Caitanya-caritāmṛta (Adi 5: 43-44, 48) it is said: “One variety of the pastimes of the spiritual energy is described as pure goodness (viśuddha- sattva). It comprises all the abodes of Vaikuntha. The six attributes are all spiritual. Know for certain that they are all manifestations of the opulence of Sankarsana. That Sankarsana, who is transcendental pure goodness, is a partial expansion of Nityananda Balarama.”
Caitanya Bhagawata Adi 1:60 & Purport; Srila Bhaktisiddhanta Saraswati Thakur