“The souls of emperors and cobblers are cast in the same mold…The same reason that makes us wrangle with a neighbor creates a war betwixt princes.”
Book II, Ch. 12
Essais (1595), Book II
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Michel De Montaigne 264
(1533-1592) French-Occitan author, humanistic philosopher, … 1533–1592Related quotes

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“We cannot solve the problems using the same kind of thinking we used when we created them”
"Einstein's famous saying in Copenhagen", as quoted in a FBIS Daily Report https://books.google.de/books?id=DfQTAQAAMAAJ&q=%22We+cannot+solve%22: East Europe (4 April 1995), p. 45
Disputed