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.
Today is the Feast Day of Saint Joseph the Worker. Pius XII instituted the feast in 1955 as a response to Communist May Day celebrations. In 1949 he issued the Decree Against Communism which excommunicated all Catholics collaborating with Communist organizations.