The purpose of your life remains a mystery, because your life is limited with no specific task dictated by creation & you have to plan for yourself individually with your own intellectual ability for reasoning & taking actions according to your circumstances.
The fact is that as long as you are alive, you have to be active to keep yourself mentally & physically strong. If you fail to take advantage of your extra intelligence, cognizance level & more freedom of movement & capabilities compared to other species, to discover new ways of living, you will be bundled out as useless creature on earth.There is no greater purpose than the purpose of utilizing your intellectual faculty to achieve what little is possible to justify your existence.