The animal tendencies gave way to human reason and humane thoughts. Extending the same logic we may further say that in future, from this part animal, part human and part divine being, there would emerge a spiritual man of divine consciousness, the Superman of Sri Aurobindo, with supra mental consciousness.

If you look at the personality of an ordinary human being, you will realise that there is a lot in him, that is grosser and denser which cannot be purified and transformed in the shorter time of one life span. What is a hundred years or less than a hundred of life on a scale of millions of years of continuous evolution of life on earth ? Doesn’t it sound illogical to say that we would remain static from the evolutionary point of view, while every thing else all around us is changing and evolving constantly?

Hinduism does not accept the premise that under normal circumstances an individual soul can free itself completely from the entanglement with Samsara and unite with its Creator in just one life time. The Jiva has to evolve through the cycle of innumerable births and deaths before the soul can liberate itself.

From inert matter to inert consciousness and then to dynamic consciousness, from ignorance to semi awareness and then to self awareness, from attachment to detachment and then to complete freedom, from illusion to awareness and then to reality, from darkness to dawn and then into light, from mortality to immortality: this is the forward movement of life in the whole creation. And all this cannot happen just in a few hundred years. It is very obvious that God did not create the worlds and the beings in His likeness, but in exact opposite to it. — Hinduwebsite.com