Who really said it
You are as young as your faith, as old as your doubt; as young as your self-confidence, as old as your fear; as young as your hope, as old as your despair
The sentence comes from Dr. Frank Crane’s essay “Youth,” which was in print by April 1914 and was reprinted under his byline in Cosmopolitan that May. MacArthur kept a framed version of the essay over his desk and recited this passage at his 75th-birthday banquet in 1955, and that is how his name became attached to it. Samuel Ullman’s family also claimed the essay, but Quote Investigator gives Crane’s printings precedence.
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