Who said "I have become aware of your threats."?

This quote is attributed to Thanos.

I have become aware of your threats. - Thanos

"I have become aware of your threats."

Thanos Fear

"I am inevitable."

"The hardest choices require the strongest wills."

"Perfectly balanced, as all things should be."

"You should have aimed for the head."

"Face your fears with courage."

"You can't live your life in fear."

"Snakes. Why'd it have to be snakes?"

"Fear is just another obstacle to overcome."