Well, there seems to be no ultimate purpose. Life will take whatever purpose you want to give it. No purpose, if it gives you happiness, is a less perfect purpose. It could be a simple or complex reason, but its aptness will only depend on its ability to motivate you / make you happy and nothing else. We are but a speck of dust in the unraveling of the universe, and there is no less or more important purpose if we consider the scale at which we exist. We all have risen from this earth, and to it we shall return in time. But for the time we are here, let's not squander away our precious time. Let's do something to make it count for ourselves.