A small selection:
Regarding history, the real power lies not in piling up more facts, but in being able to see relationships between them. When one can grasp fundamental similarities between past and present, despite circumstantial differences, one can learn and apply the "lessons of history," i.e. the principles applicable to all human life. If one can grasp the connection between the actions of people in the past, and the world that those actions produced, one can develop a proper appreciation for the man-made values around us.
Let us look more closely at these crucial values.
When the Founding Fathers created the United States, they realized that many of the problems they faced were unique and required unique solutions. Unquestionably, however, they also looked back on the history of Western civilization, and drew momentous lessons from it, including the fact that the separation of church and state is an objective requirement of progress. Thomas Jefferson, drawing on history, noted, "In every country and in every age, the priest has been hostile to liberty. He is always in alliance with the despot, abetting his abuses in return for protection to his own." In a previous correspondence, Jefferson remarked, "History… furnishes no example of a priest-ridden people maintaining a free civil government." His great
collaborator in the project of American secularism, James Madison, commented in a letter to a friend that "Every new and successful example, therefore, of a perfect separation between the ecclesiastical and civil matters, is of importance; and I have no doubt that every new example will succeed, as every past one has done, in showing that religion and Government will both exist in greater purity the less they are mixed together."