“Prince Bismarck once said that one-third of the students of German universities broke down from overwork; another third broke down from dissipation, and the other third ruled Germany.”
"Address in Berkeley at the University of California (109)" (23 March 1962) http://www.jfklibrary.org/Research/Research-Aids/Ready-Reference/JFK-Quotations.aspx<!-- Public Papers of the President: John F. Kennedy, 1962 -->
1963, Address at the Free University of Berlin
Variant: And Prince Bismarck was even more specific. One third, he said, of the students of German universities broke down from overwork, another third broked down from dissipation, and the other third ruled Germany.
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