Vedastra-incarnation

Concept of Hindu[sanatan] dharm is as simple as other dharm’s almighty oneness .Prayaanakaale manasaachalenaBhaktyaa yukto yogabalena chaiva;Bhruvormadhye praanamaaveshya samyakSa tam param purusham upaiti divyam.At the time of death, with unshaken mind, endowed with devotion and by the power ofYoga, fixing the whole life-breath in the middle of the two eyebrows, he reaches that resplendentSupreme Person , the one Almighty .Now , hindu dharm tells to achieve this goal either by leaving no chance or by attaining the human body in second time and this human body can be achieved only when human form of the almighty is in mind at the death time , that is symbolic worship .Antakaale cha maameva smaran muktwaa kalevaram;Yah prayaati sa madbhaavam yaati naastyatra samshayah.And whosoever, leaving the body, goes forth remembering , the almighty form alone at the time of death,he attains same being; there is no doubt about this.This is great BHAGWAT GITA GYAN .Also as per Vedas human form can be achieved , three times only , 1st for knowledge 2nd for duty and 3rd for bhakti or liberation .
The Avtar [incarnation] theory for DUTY is as follows…
Praapya punyakritaam lokaanushitwaa shaashwateeh samaah;
Shucheenaam shreemataam gehe yogabhrashto’bhijaayate.
Having attained to the worlds of the righteous and, having dwelt there for everlasting
years, he who fell from Yoga is reborn in the house of the pure and wealthy .

Athava yoginaameva kule bhavati dheemataam;
Etaddhi durlabhataram loke janma yadeedrisham.

Or he is born in a family of even the wise Yogis; verily a birth like this is very difficult to obtain in this world .
For three births , first gyan comes…Rasavarjam raso’pyasya param drishtwaa nivartate.The objects of the senses turn away from the abstinent man, leaving the longing(behind); but his longing also turns away on seeing the Supreme.Then comes the duty…..Jijnaasurapi yogasya shabdabrahmaativartate.By that very former practice he is borne on in spite of himself. Even he who merelywishes to know Yoga transcends the Brahmic word. Then at last liberation is achieved……Kimaachaarah katham chaitaam streen gunaan ativartate.What are the marks of him who has crossed over the three qualities, O Lord? What is hisconduct and how does he go beyond these three qualities?