I have a map, but where are the directions?

I'm lost,
Do you know how to get to...?
That's the thing though.
I don't know my destination.
Yeah life is about the journey,
But it'd sure be nice to know where I'm heading to.
I want a smile that won't fade away,
the ability to see light on a rainy day
I want to leave a mark,
like that smile, I'm here to stay.
That requires one thing:
I've gotta go find myself.
Because right now, all I'm asking is,
Who am I?