Memories are dangerous things. You turn them over and over, until you know every touch and corner, but still you'll find an edge to cut you.

Being able to “think outside the box” presupposes you were able to think in it

The past beats inside me like a second heart.

Had I known how sweet they were
I would have saved more of these memories

Memories are pleasures of the past.

It's a pleasure to share one's memories. Everything remembered is dear, endearing, touching, precious. At least the past is safe /though we didn't know it at the time. We know it now. Because it's in the past; because we have survived.