meaning of life

Have you ever pondered the meaning of life? You wonder what your role is, why you exist and where you fit in. In thinking about this very same idea the other day, I had an apifany; instead of thinking about your life, think about the life of someone who has already lived. Think about your grandparents, think about their grandparents, think about the Romans during the time of Julius Caesar. What was the meaning of their life? How did they fit into society, the world or the universe and then we could compare our lives with theirs.
We all hope that there is more and we are not just on this planet for a blink of an eye in all of time and that our lives, thoughts, feelings are just a culmination of really complex cells coming together in a mass we call our body and making us think that we are more then we really are. I guess we can't just think about what the meaning of our life is, but what the meaning of all life is?