Meaning of Life: Do you Always Think about it? Why?

I am thinking about the meaning of life and the purpose of life everyday. I guess I am trying to justifying my being on this earth and the reason I am here. I am grateful for many blessings but I am also puzzled with the circumstances that I am in. Sometimes, things just don't make sense to me, especially when I know that other people have most of the things handed to them from the universe.