Pop's uncanny ability to help us define and understand our lives makes it more powerful than film or books, writes Miranda Sawyer. Recently, I thought I'd listen to a song I hadn't heard in a while. Mary Lou Lord's version of Bob Dylan's You're Gonna Make Me Lonesome When You Go is one of my favourites. It's a live recording, her perfect, almost childlike voice and acoustic guitar adding sweetness to Dylan's heartbreak classic. So, I cued it up on my phone, whacked up the volume... But I had to stop listening. Gulping sobs on the 159 bus are OK, but not if you're out of tissues and have to use an empty Tangfastics packet to mop your snot.