Who said "A man may change his course, but not his character."?

This quote is attributed to Don Quixote.

A man may change his course, but not his character. - Don Quixote

"A man may change his course, but not his character."

Don Quixote Change

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."

"Change brings new opportunities."

"Every day is a new opportunity."

"Healing doesn't mean forgetting."

"You either get better or you get bitter."