[waspguy]

I understood it to be the part of Voldemort’s soul that he had put into Harry as a horcrux.

[Bear_in_RoseBear]

Yep, so did I.

But I still found it creepy! ;)

[Explorer89]

Voldemort didn’t put his soul into Harry.....his soul was so unstable that it fractured when the curse rebounded against him, and it attached himself to the only living thing in the house....Harry. It wasn’t intentional.