Lyric discussion by Tarvos 

I don't quite think it's abuse, nor an affair, though both possibilities have crossed my mind.

Personally, I think it's more...like when you love a girl who is so beautiful that she could leave you and still have men lined up waiting to take her. Like the four white stallions or four strong angels. And they've broken up and he knows she won't have a problem moving on but he does, he keeps thinking about how beautiful she is, and hates himself for it.

And then he starts to find that there's nothing left of him in her except her heart might still be a little broken.

Just my take.

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