Who said "The stones have made me strong. Too strong, perhaps."?

This quote is attributed to Thanos.

The stones have made me strong. Too strong, perhaps. - Thanos

"The stones have made me strong. Too strong, perhaps."

Thanos Strength

"I am inevitable."

"The hardest choices require the strongest wills."

"Perfectly balanced, as all things should be."

"You should have aimed for the head."

"Strength comes from within."

"A woman should be proud of who she is."

"A strong woman can overcome anything."

"The only thing I'm good at is killing."