Albert Einstein (2015). “Bite-Size Einstein: Quotations on Just About Everything from the Greatest Mind of the Twentieth Century”, p.12, St. Martin's Press
Albert Einstein (2015). “Bite-Size Einstein: Quotations on Just About Everything from the Greatest Mind of the Twentieth Century”, p.32, St. Martin's Press
Back to Methuselah pt. 1, act 1 (1921). This was a favorite quotation of Robert F. Kennedy's, and Edward M. Kennedy used it in his eulogy of Robert Kennedy.
Francis Parkman, David Levin (1983). “France and England in North America: Pioneers of France in the New World. The Jesuits of North America in the seventeenth century. La Salle and the discovery of the Great West. The old régime in Canada”, p.27, Library of America