Respectfully Quoted: A Dictionary of Quotations. 1989.
George Santayana (18631952)
Progress, far from consisting in change, depends on retentiveness . when experience is not retained, as among savages, infancy is perpetual. Those who cannot remember the past are condemned to repeat it . This is the condition of children and barbarians, in whom instinct has learned nothing from experience.
GEORGE SANTAYANA, The Life of Reason, vol. 1, chapter 12, p. 284 (1905).