When They descend to the material creation, They assume the name Avatar a. An Avatar a is a personal form of the Supreme Being and innumerable such divine forms reside in an eternal spiritual realm. An ordinary soul may take on a gross material body, but in the case of God, His 'soul' and His 'body' refer to the same spiritual essence. Although They have no obligation to come into contact with the material energy, the Avatar as descend into this world for our own protection, instruction and redemption. Although They may potray human weaknesses such as grief and anger, They are never to be considered ordinary people.
Human beings act out of earthly desire, fear and anger.
The Avatar , however, acts out of His own blissfully divine nature performing exhuberant pastimes for the pleasure of His pure devotees. God is one, yet He manifests Himself in innumerable forms within this world. To deliver the pious and to annihilate the miscreants, as well as to establish the principles of religion, I Myself appear, millennium after millennium. The ultimate mission of incarnations is to arouse love of God everywhere. In fact, a very systematic analysis of the Avatar s based on thse Vedic texts was expounded in the early sixteenth century by the devotional saint Shri Chaitanya, Himself an Avatar a.