Lyric discussion by stk137 

I am surprised no one has mentioned St. John of the Cross.

en.wikipedia.org/wiki/St_John_of_the_Cross

He was a 16th century christian mystic who authored the Dark Night of the Soul. It's commonly referenced concept for a dark (depressing, fearful, lonely, etc) period one must go to attain some necessary personal rebirth.

Just a thought, from which you add some more meanings if you like.

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