Progress Depends on Retentiveness

Progress, far from consisting in change, depends on retentiveness. When change is absolute there remains no being to improve and no direction is set for possible improvement: and when experience is not retained, as among savages, infancy is perpetual. Those who cannot remember the past are condemned to repeat it.

— George Santayana, 1906

From the book The Life of Reason: Reason in Common Sense