The "purpose" of life is what you make it of course, a relative thing, I don't use "purpose" in some grand metaphysical sense disconnected from people that is often solely the stance of those with a religious bent...no, I feel personally fulfilled that I am the guide of my life, what ever I chose to do it is me that is the conductor of the great symphony that attends the short time I have on this rock. (longer if we succeed in eradicating the disease of aging in the next 20 years as we are on schedule to do!)
I am contended to know that our consciousness is a blip on the continuum that through our work over centuries passed on from one to the next we are able to extend temporally, opening a wider stage over which to do our life dance. Ultimately, we are in the infinite expanse of existence an infinitesimal blip of many such blips that came infinitely before and will come infinitely after, I can't think of anything more beautiful than that continuum. If I could call anything God it would be the continuum of spaces and times created by the march of energy about nothing (Since energy itself is all a function of time after all, it can be created and destroyed so long as the dance continues forever!) As an undergraduate engineering student I imagined the universe in this way, a transitory blip of "up" over the down "soon" to come, and now with the discovery of dark energy and it's amazing alignment with the quantum scale zero point energy, it seems my ideas were aligned with a deep truth of reality...that all of the energy that makes up our universe comes from the nothing of the void and that we ourselves owe existence to a dance of the void over a longer universal time scale...which itself is still a blip on the continuum. The beauty of that symmetry at all scales is what has me convinced of its truth, still full of mystery but without hocus pocus, still full of wonder but without paradox. Complex but astoundingly simple.
To me, that is fucking awesome!