the will of nature

[killingbodhi]

"...every man is more than just himself; he also represents the unique, very special and always significant and remarkable point at which the world's phenomena intersect, only once in this way and never again. That is why every man, as long as he lives and fulfills the will of nature, is wondrous, and worthy of every consideration. In each individual the spirit has become flesh, in each man the creation suffers, within each one a redeemer is nailed to the cross." - Hermann Hesse

So what is the real will of nature for human beings, as defined by nature and not by humans? And what is my role in that?