Lyric discussion by 42 steps 

Musing on a broken street sign as a barometer for "how am I feeling today". An extraordinary power conferred upon it, the belief/supersition that it not only predicts the day but actually FORMS it (Maybe you could see it in your heart one day, to let me....).

The last stanza refers to the desire of the narrator to be able to see and ultimately understand, and even control, its power over him.

Heh. That's what I think, anyway. :)

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