Originally posted by LikeASong:[..]
Not necessarily. Imagine Achtung Baby with Scarlet as the 13th track after Love Is Blindness, or The Joshua Tree with Grace as the 12th track after Mothers Of The Disappeared. They'd still be their masterpieces but you could choose those particular songs as their worst ever. They don't need to belong to their overall weakest album.
For me, I'll put October on before SOE or NLOTH. Worst is such an objective term too. It's objective to the person, and the situation. Imagine listening to a song like Scarlet when you are blessed, and happy and thankful, and then listening to it when you're at your lowest. The message would be the same; your reaction would be different. John Lennon said (paraphrased) that you sing a song to 1,000 people for one reason, and they sing it back for 1,000 others. To close, for my money, U2's "worst" song is far superior to my "best" song
And of course their "worst" song is worth much more than many bands' complete discographies out there.