Who said "Never utter the word 'impossible'; it is a coward's word."?

This quote is attributed to Don Quixote.

Never utter the word 'impossible'; it is a coward's word. - Don Quixote

"Never utter the word 'impossible'; it is a coward's word."

Don Quixote Motivation

Character in Don Quixote

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"The Knight of the Sorrowful Countenance"

"I know who I am, and who I may be, if I choose."

"Facts are the enemy of truth."

"The pen is mightier than the sword."

"I believe in working hard for what you want."

"Never underestimate the power of determination."

"I don't need a reason to fight."

"The most important thing is the mission. Nothing else matters."