Who said "Be grateful for the people who believe in you."?

This quote is attributed to Rubeus Hagrid.

Be grateful for the people who believe in you. - Rubeus Hagrid

"Be grateful for the people who believe in you."

Rubeus Hagrid Gratitude

"You're a wizard, Harry."

"I'm not supposed to tell you that, but I will anyway."

"Yer mum and dad would've been proud."

"There's no Hogwarts without magic, and there's no magic without wonder."

"Gratitude makes life richer."

"A grateful heart is a happy heart."

"Respect those who came before us."

"Life's greatest treasures are the people we love"