Who said "I will not rest until the threat of Ultron is vanquished."?

This quote is attributed to Thor (Age of Ultron).

I will not rest until the threat of Ultron is vanquished. - Thor (Age of Ultron)

"I will not rest until the threat of Ultron is vanquished."

Thor (Age of Ultron) Perseverance

"I am mighty, but I am not all-powerful. This is a lesson I continue to learn."

"A warrior's strength comes not just from muscles, but from the heart that drives them."

"We are stronger together than we could ever be apart."

"The best of us must sometimes make the hardest choices."

"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."