Board Thread:Spoilers!/@comment-188.2.240.241-20130220203144/@comment-189.131.98.183-20130224225945

I also got another theory, the "unconventional enchantment" the Blue Fairy gave Snow to save her mother could be that she store all of her feelings&memories in the heart, so when she found someone who loved her just as much as Eva she could insert the heart and that person would now have Eva's memories and act upon them, meaning she never dies, just evolves into another person, so that's why Snow is distressed about the heart