Who said "What makes a man a fool is not his ignorance but his pride."?

This quote is attributed to O. Henry.

What makes a man a fool is not his ignorance but his pride. - O. Henry

"What makes a man a fool is not his ignorance but his pride."

O. Henry Wisdom

Writer American 1862–1910

"Turn up the lights. I don't know what time it is."

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