This is the whole concept of life. Things are supposed to be meaningful to us, and we shift our perception to achieve this. Weare entire universes, each on ourselves, and we are only accidentally touching other universes for a swift moment in time. We are alone in the universe. We are made to deal with everything that happen around us. And from time to time we change other people life by making a mark in their life. But nevertheless, the challenge is accepted.
Unless we accept the budhist way of life and reincarnation truly exists. I will find out about this when I die. :)