Back Of My Mind Lyrics

In the back of my mind, I saw the door.
In the back of my mind, I went for more.
In the back of my mind, less than I see.
In the back of my mind, not enough for me.

In the back of my mind, I saw the door.
In the back of my mind, I went for more.
In the back of my mind, but you shut it on me. In the back of my mind, now what do I see?