What Makes a Classic?

What makes a classic?  Well, for one thing, it’s got to have some staying power.  The Bob Dylan song, “Like A Rolling Stone,” certainly fits the bill. It was recorded more than fifty years ago but it’s still considered by many to be the greatest pop single ever made.  In this hour of To The Best Of Our Knowledge, Greil Marcus tells us what makes “Like A Rolling Stone” a classic.  Also “Lolita,” “Leaves of Grass” and “Psycho.”