Voice
I've noticed that when I talk, I often copy those around me. I copy others so often that I wonder — how much of my voice belongs to me? How often do I speak through others' tongues?
Or an alternate perspective. All of those voices belong to me. Thus, my voice is the voice of the world. It is the voice of my life.
This can be extended to all parts of me. Every action I take, every decision I make, every thought that I think: they are all of my story. In fact, at each moment, every human being is constantly telling their story. Perhaps, with enough time, one can learn to read them.