For this journey, you were told to find a way to sustain life indefinitely: to hold yourself throughout time as an unceasing presence in some way. But life is only really possible because of this inevitability, the only thing that is a certain, called death.
To live is to be unstable: to experience and be thrown across the clouds of reality and to fall between them through the gaps. We seek to find equilibrium in the wake of this chaos which life brings--some sort of balance that feels like serenity, bliss, peace. To achieve such balance, though, in the terms brought to us by both science and religion, both mind and soul is to reach a point of death.
We cannot search for peace in this world and hold with it the possibility of life forever. They are two aspirations of man with antagonizing definitions: impossibilities when translated into reality like concurrent parallels. In theory, balance and life sounds like heaven on earth.
There is a reason why