(A messenger delivers Al Gough's letter to Celia. Gough reads the beginning of text of the letter as Celia reads.) AL GOUGH: Dear Celia, I don't know your last name, and I don't know where you live, but I know you have two young boys – Twins, I believe. And I know you didn't have a flash-forward. ♪ All the thoughts you never see ♪ ♪ You are always thinking ♪ ♪ Brain is wide ♪ ♪ The brain is deep ♪ ♪ Oh, are you sinking? ♪ ♪ Feel the path of every day ♪ ♪ Which road you taking? ♪ ♪ Breathing hard, making hay ♪ ♪ Yeah, this is living ♪ ♪ Feel the air, up above ♪ ♪ A pool of blue sky ♪ ♪ Feel the air ♪