Whats Missing?

I feel as if my mind had gone astray
A long time ago; In my youth
when all I wanted was to play
I do not know when and I do not know how
All that matters is that I'm back now
And I feel whole once again
But at times I ponder about back then
Back when there was a void in my life
when a piece of my being was cut from me
Cut away as if by a sharp knife
With such precision that it left no evidence of my loss
The loss that was my memory was the cost
The memory of what it was that I had lost
Something was missing and now it is back
But still I can't remember what I had lacked
It feels like I'm going in a circle
But its not worth it all
To remember or to forget
To leave it alone is my best bet
As long as its a decision that I wont later regret