Several great acharyas (like Shankara, Nimbarka, Madhva, Ramanuja & Vallabha) discussed the Vedas and came to different vedantic thoughts, which gave rise to various schools of vedantic thoughts. The history of Vendata really begins with the system of Shankarachaya who propounded the theory of kevaladvaita. After him, other achayas like Ramanuja, Nimbarka, Madhva and Vallabha, appeared one after another. These thinkers happened to be followers of Bhagwat school, could not accept Shankara's interpretation of the basic texts, namely the Upanishads, Bhagwad Geeta and brahmsutras and offered their own interpretations. Shankara could not naturally make much appeal to the masses that found sufficient food in the bhakti (devotion) schools of Ramanuj and others. In other words, jnana (knowledge) lost its previous hold and made room for bhakti.
The “Poshana leela”, which is one of the ten types of leelas done by Lord shri Krishna, is described in the sixth canto of shreemad bhagwat mahapurana. The word “Poshana” means to nourish. This is actually also called as “Pushti”. This nourishment (divine nourishment) is done by Shree Krishna himself. Due to the grace (poshana) of lord, the selfless, complete and eternal devotion towards the lord appears in the jeeva (being). This type of unique type of bhakti is known as “pushti-bhakti”. The proclaimer of this path, who for the first time introduced the world with “Devotional path of grace”, is Shree Vallabhacharya (1479-1531 A.D). In this path, the dharma (Religion), Artha, kama and moksha are completely meant for the lord. The same is acknowledged in the below text from Shreemad bhagwat mahapuran second canto, tenth chapter.