Borges once said, "I have always secretly imagined that paradise should be a kind of library."
As a poet, this was what he wrote to his son:
It was not I who gave birth to you, but the dead.
My father, his father, and his forefathers; the people who mapped out a long labyrinth of love, beginning in the deserts of Adam, Cain, and Abel. At a dawn so ancient it had already become myth, they, with all their flesh and blood, arrived together at this future day, this moment when I gave birth to you.
I feel how numerous they are. We are them, and between us are you and the sons you will one day bear.
The last son and the son of red Adam. Those people are all me as well. Eternity hides within things that belong to time, within those fleeting forms.
Though it was hard to believe, the students of Idiot Academy loved haunting the library. Harry had overheard the Hufflepuffs gossiping about him being Slytherin's heir when Hannah Abbott and Macmillan were studying together.
The world itself was a vast labyrinth, while time spread out into countless intersecting paths. That was why we had infinite possibilities in our three-dimensional lives.
Harry's ability to understand Parseltongue was not necessarily because Voldemort's soul had attached itself to him.
It was not James Potter who had given birth to him, but the dead. Lily's parents were Muggles, so they probably did not carry the blood of Slytherin's descendants.
The Potter family had always been pure-blooded. Perhaps Slytherin's bloodline had been passed down to Harry through a series of coincidences.
Pomona did not believe Harry was a Horcrux. He had some kind of connection with Voldemort, but he was not a Horcrux.
If necessary, she would investigate the