Nothing may seem to matter in the long term, including our individual existences , and while this may be true,to an extent, we exist in the present moment, and we ought to live in this moment, exist simply because it is joyous to do so, contemplate things around us, feel awed by existence itself.
Our moment is now, and we ought to seize it. Purpose is momentous and wide-spread, rather than a localized entity that we ought to trace. Carpe Diem !