The Possibility and Purpose of Avatarhood: 1

Srimad Bhagavat Gita
IN speaking of this Yoga in which action and knowledge become one, the Yoga of the sacrifice of works with knowledge, in which works are fulfilled in knowledge, knowledge supports, changes and enlightens works, and both are offered to the Purushottama, the supreme Divinity who becomes manifest within us as Narayana, Lord of all our being and action seated secret in our hearts for ever, who becomes manifest even in the human form as the Avatar, the divine birth taking possession of our humanity, Krishna has declared in passing that this was the ancient and original Yoga which he gave to Vivasvan, the Sun-God, Vivasvan gave it to Manu, the father of men, Manu gave it to Ikshvaku, head of the Solar line, and so it came down from royal sage to royal sage till it was lost in the great lapse of Time and is now renewed for Arjuna, because he is the lover and devotee, friend and comrade of the Avatar. For this, he says, is the highest secret,—thus claiming for it a superiority to all other forms of Yoga, because those others lead to the impersonal Brahman or to a personal Deity, to a liberation in actionless knowledge or a liberation in absorbed beatitude, but this gives the highest secret and the whole secret; it brings us to divine peace and divine works, to divine knowledge, action and ecstasy unified in a perfect freedom; it unites into itself all the Yogic paths as the highest being of the Divine reconciles and makes one in itself all the different and even contrary powers and principles of its manifested being. Therefore this Yoga of the Gita is not, as some contend, only the Karmayoga, one and the lowest, according to them, of the three paths, but a highest Yoga synthetic and integral directing Godward all the powers of our being.

Arjuna takes the declaration about the transmission of the Yoga in its most physical sense,—there is another significance in which it can be taken,—and asks how the Sun-God, one of the first-born of beings, ancestor of the Solar dynasty, can have received the Yoga from the man Krishna who is only now born into the world. Krishna does not reply, as we might have expected him to have done, that it was as the Divine who is the source of all knowledge that he gave the Word to the Deva who is his form of knowledge, giver of all inner and outer light,— bhargah savitur devasya yo no dhiyah prachodayat; he accepts instead the opportunity which Arjuna gives him of declaring his concealed Godhead, a declaration for which he had prepared when he gave himself as the divine example for the worker who is not bound by his works, but which he has not yet quite explicitly made. He now openly announces himself as the incarnate Godhead, the Avatar.
We have had occasion already, when speaking of the divine Teacher, to state briefly the doctrine of Avatarhood as it appears to us in the light of Vedanta, the light in which theGita presents it to us.We must now look a little more closely at this Avatarhood and at the significance of the divine Birth of which it is the outward expression; for that is a link of considerable importance in the integral teaching of the Gita. And we may first translate the words of the Teacher himself in which the nature and purpose of Avatarhood are given summarily and remind ourselves also of other passages or references which bear upon it. “Many are my lives that are past, and thine also, O Arjuna; all of them I know, but thou knowest not, O scourge of the foe. Though I am the unborn, though I am imperishable in my self-existence, though I am the Lord of all existences, yet I stand upon my own Nature and I come into birth by my self-Maya. For whensoever there is the fading of the Dharma and the uprising of unrighteousness, then I loose myself forth into birth. For the deliverance of the good, for the destruction of the evil-doers, for the enthroning of the Right I am born from age to age. He who knoweth thus in its right principles my divine birth and my divine work, when he abandons his body, comes not to rebirth, he comes to Me, O Arjuna. Delivered from liking and fear and wrath, full of me, taking refuge in me, many purified by austerity of knowledge have arrived at my nature of being (madbhavam, the divine nature of the Purushottama). As men approach me, so I accept them to my love (bhajami); men follow in every way my path, O son of Pritha.”
But most men, the Gita goes on to say, desiring the fulfilment of their works, sacrifice to the gods, to various forms and personalities of the one Godhead, because the fulfilment (siddhi) that is born of works,—of works without knowledge, —is very swift and easy in the human world; it belongs indeed to that world alone. The other, the divine self-fulfilment in man by the sacrifice with knowledge to the supreme Godhead, is much more difficult; its results belong to a higher plane of existence and they are less easily grasped. Men therefore have to follow the fourfold law of their nature and works and on this plane of mundane action they seek the Godhead through his various qualities. But, says Krishna, though I am the doer of the fourfold works and creator of its fourfold law, yet I must be known also as the non-doer, the imperishable, the immutable Self. “Works affect me not, nor have I desire for the fruit of works;” for God is the impersonal beyond this egoistic personality and this strife of the modes of Nature, and as the Purushottama also, the impersonal Personality, he possesses this supreme freedom even in works. Therefore the doer of divine works even while following the fourfold law has to know and live in that which is beyond, in the impersonal Self and so in the supreme Godhead. “He who thus knows me is not bound by his works. So knowing was work done by the men of old who sought liberation; do therefore, thou also, work of that more ancient kind done by ancient men.”
Source:- Essays on The Gita by Sri Aurobindo. (First Series, Ch. XV)