BRS 3.4.5

Verse 5 elaborates on Kṛṣṇa as the ālambana. Asya refers to Kṛṣṇa, who appears in the form of a son, who is to be known (vedyasya) without manifestation of power (prabhāvānāspadatayā). Even if He sometimes shows such powers a little, the elders attribute the powers to something else. Because His mother and others think that He is their son, who is completely tender both internally and externally, He becomes the object of their desire to care for Him (anugrāhyatva). Because of this and only this--that is, becoming the object of their care and compassion (anugrāhyatvāt)—Kṛṣṇa, a son without manifestation of power, is famous as the vibhāva (vibhāvatā) in vatsala-rasa (atra). He is famous as that form which generates a taste for the rati called vatsala (vibhāvatā) in persons acting as parents. That vibhāva, accomplished by Kṛṣṇa manifesting Himself as their son (asya), and by the appearance of compassion in the elders as previously mentioned (anugrāhyatvāt), becomes completely glorious in all ways (kīrtitā). This vibhāva however generates taste for vatsala only by certain stimuli (uddīpana) or qualities in the vibhāva (Kṛṣṇa). Thus, the word guṇasya ca is used, referring to Kṛṣṇa with the qualities mentioned in the previous verse. Vātsalya and anugraha are differentiated as cause and effect. Vatsala is affection, thinking that Kṛṣṇa is one’s son or the son of a brother etc. Anugraha is the consequent desire to care for Kṛṣṇa.