Deep question! The rai·son d’ê·tre of human existence; the many other possible reasons why we are; random individual constructs offered as personal explanations and, of course, the unbelievable mental fecal matter that passes for coping mechanisms.
The virtue of bright minds; the wealth found in human caring and sharing; the virtue not in what we have when we leave this world behind but what we leave behind when we’re gone.
Truth; honesty in perpetuating truth; enriching human wealth rather than consuming it; building upon genius and augmenting it with each subsequent generation; and recognizing the worth in each individual in this finite resource we know as humanity.
Lastly, or perhaps centrally, how will the world be better by the passing of each of us through the panorama of the human process?