death of innocence

I found this quote recently:

"this is for the death of innocence.. it died somewhere between the head and the heart."

Who said this? What was it in the context of? I sense much disillusion and bitterness in the words. If such a death of innocence leads only to an intellectual awakening, why mourn? If this isn't true, I would want to know what else can be born of it, for death doesn't exist in isolation.