It's only a matter of remembering it. You will never have an empty void if you are true and you love yourself. No one can understand why things happen the way they do. They can only just sit there, watch things happen, and reflect upon it.
Reflection allows one to expand one's own world view and sense of self.
There is no such thing as time, only change and infinite revelation. I think life is very meaningful. Everyone must make the most of their own personal lives to make it meaningful to them. Life should be meaningful to that particular persons life. It doesn't matter if your mother or father don't think you your life is meaningful.