Lily's Magic

The first time I saw you, Harry, I recognized you immediately. Not by your scar. By your eyes. They're your mother Lily's.

(nodding)

Yes. I knew her. She was there for me at a time when no one else was. We used to talk for hours. She was not only a singularly gifted witch but an uncommonly kind woman. She had a way of seeing the beauty in whoever she met, even, and perhaps most especially, when that person couldn't see it in themselves...

Lupin's eyes glaze in memory, then he blinks, smiles.

- Harry Potter and the Prisoner of Azkaban Script