Some things are uncertain in this world with respect to time, just like death. Some questions are unanswerable and some are just confusing. It entirely depends upon your mind how you make set up to get the things in your mind. In this world every human always makes the struggle for living for the betterment of his life and children. But no one will consider this fact to take into account that we have to leave this sphere ball one day, and the entire system will vanish from this universe.