Those who cannot remember the past are condemned to repeat it. (Wall of Text)

[Hasbinbad]

Also, to whatever mongrel who said that I misquoted:

"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." (Santayana)

Santayana, George. The Life of Reason; or the Phases of Human Progress. New York: Charles Scribner's Sons, 1905. Book.