Why Can't I Remember?

I think, I think, I think and I think
About the life I had before
But no matter how much I think and think
I can't remember anymore

I try, I try, I try and I try
To make the memories return
And even though I try and try
I'm starting to get concerned

I sit, I sit, I sit, and I sit
Wondering about my life
And no matter how long I sit and sit
There are no memories in sight

I fret, I fret, I fret and I fret
You don't know how hard I'm trying
To simply remember the memories
My brain seems to be hiding.