The outer edge

I'm trying so hard
To keep the sides of my mind apart
What do you want of me?
Some things we cannot wear on the outside
I've tried drawing a line
'Round the edge of my heart
Where do you want to start?

Behind, if I turn my back on it
I woke but I couldn't open my eyes
Behind, if I turn my back on it
I spoke but all in straight lines

I'm taking my time
And using it and losing it
I'll see you on TV
I wrote to you and you wrote to me
Five hundred times, but I couldn't see
The answer was in front of me
So where do you want to start?