Who said "My gratitude is not a thing you will know."?

This quote is attributed to Hela.

My gratitude is not a thing you will know. - Hela

"My gratitude is not a thing you will know."

Hela Gratitude

"I am Hela, goddess of death. Kneel before me."

"Everything you know will fall to ruin."

"I've spent millennia in that prison, and now I'm free."

"You cannot fight your own destiny."

"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"