Who said "Gratitude is for the weak. We acknowledge no debt."?

This quote is attributed to Dalek.

Gratitude is for the weak. We acknowledge no debt. - Dalek

"Gratitude is for the weak. We acknowledge no debt."

Dalek Gratitude

"Exterminate! Exterminate!"

"You will be exterminated!"

"Daleks do not feel pity or remorse or fear."

"We are superior. We are pure."

"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"