Our own morality is a direct reflection of our own mortality. Despite whatever religion or lack of religion that someone were to follow there is a common census that your actions on the earth determines not only your embodied moral bearing but any afterlife that may exist. All of the worlds joys, fears, heartbreak, aspirations and goals are a creation of lifes sands filtering through the hourglass. Without the knowledge of when our time will run out causes us to follow our own internal doctrine that not only guide us but gives us comfort in the fact we are doing the "right thing". The Reapers looming shadow at the end of each and every one of our lives created the social construct that is based upon our morality. If we were to to know that our sand would forever flow our actions as well as the implications of our actions would be drastically different.
What are yours?