Are we all afraid of eternity? I think the answer is yes. Our society is not doing a good job of convincing us that we all want to live eternally.
Instead, we buy into the idea of living eternally on Earth in the form of a vampire or other supernatural creature that has become so popular in the TV shows currently on each channel. Why do we believe something that is make believe and yet cannot get our heads around something that has been true for thousands of years?
I have heard many reasons. Religion, society, work ethic, war, not war, economics, greed... they all may be part of it.
As the poster says, "We are the mirror!"