Well xovonob The beauty about U2 songs is that you can percieve it as it suits you,eg.Even Better Than The Real Thing.
Since you aske about LNOE,I think its about the pressure of living this life in franatic pace of material world, where most of the things you deal with are either irrelevant or lacks substance, still you've to live each day as it might be your last, you've to keep yourself on the cutting Edge every momment.Doin all this for nothing and the point is why to do these things when you're not happy with it.Well more or less thats what I think of the song, hey how bout your views, whatever it is we all will welcome that.