If you just look through the lyrics for a second I believe that there are possible bible references to Adam and Eve in the last verse like scholesy said, but also if you think about it, you could relate it to all/any of the people who take everything for granted (and there are a lot out there who do). So also in the last verse when he says "I gazed a gazely stare at all the millions here", he could be getting at all the people who have taken everything for granted and then suddenly lost everything (which once again relates to the story of Adam and Eve) and therefore "sold the world" in a metaphorical sense.
If you just look through the lyrics for a second I believe that there are possible bible references to Adam and Eve in the last verse like scholesy said, but also if you think about it, you could relate it to all/any of the people who take everything for granted (and there are a lot out there who do). So also in the last verse when he says "I gazed a gazely stare at all the millions here", he could be getting at all the people who have taken everything for granted and then suddenly lost everything (which once again relates to the story of Adam and Eve) and therefore "sold the world" in a metaphorical sense.