The concept is basically; that the pieces we know and love are made up of scales, arpeggios, and the like.
People who want to share their religious views with you almost never want you to share yours with them.
She is Cuba. If you want to love her, you have to be with her, but you can't be with her in her current state. It's the point of view of all exiles - you have to leave the thing you cherish most.