(CNN) -- Cassidy Stay has seen the worst -- the brutal killings of her parents and siblings, ages 4 to 13, in their
On Saturday, the 15-year-old quoted Dumbledore, the wise man from the Harry Potter series, in hopes of finding some good amid the horror.
"Happiness can be found even in the darkest of times," Cassidy said, citing J.K. Rowling's "Harry Potter and the Prisoner of Azkaban," "if one only remembers to turn on the light."
The remarks -- at a public memorial for her family -- were the teenager's first public comments since she emerged as the lone survivor from the carnage in her family's Spring home.
She was not there, but the Stay family was. And soon, in a barrage of bullets, six of them were dead.
They included Cassidy Stay's parents, Stephen and Katie, as well as her 7- and 9-year-old sisters and 4- and 13-year-old brothers.
Authorities: Man kills 4 children, 2 adults
Cassidy was targeted as well, with the Harris County Sheriff's Office indicating the shooting left her in critical condition. By Saturday, though, she was not only out of the hospital but standing tall, wiping away tears as people remembered her parents and siblings and offered support to her.
Thanking the first responders, doctors and nurses who'd helped her, the teenager said, "I am feeling a lot better and am on a very straightforward path to a full recovery."
Unfortunately, her family isn't coming back.
Reminders of this were everywhere, including a board that had hearts with their names -- Becca, Brian, Emily, Katie, Stephen, Zach. Cassidy mentioned them too, right after quoting Dumbledore.
"I know that my Mom, Dad, Brian, Emily, Becca and Zach are in a much better place, and that I will be able to see them again one day," she said at the gathering, held outside an elementary school.