Who said "We persevere because we must. It is our nature."?

This quote is attributed to Dalek.

We persevere because we must. It is our nature. - Dalek

"We persevere because we must. It is our nature."

Dalek Perseverance

"Exterminate! Exterminate!"

"You will be exterminated!"

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

"We are superior. We are pure."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."