[John Adams and Tomas Jefferson] shared experience in 1775 - 1776 in bringing about the separation from Britain and their service in Europe cemented a friendship that in the end withstood the most serious political and religious differences that one could imagine, especially their differences over the French Revolution. It was probably Jefferson's obsession with politeness and civility that kept the relationship from becoming irreparably broken.

[John] Adams said his objective in writing his Defence of the Constitutions of the United States and his Davila essays was to counter what he thought was the unfair criticism of the American state constitutions made by the French philosophers, especially [Anne Robert Jacques] Turgot.

[The Massachusetts constitution] resembles the federal Constitution of 1787 more closely than any of the other revolutionary state constitutions. It was also drawn up by a special convention, and it provided for popular ratification - practices that were followed by the drafters of the federal Constitution of 1787 and subsequent state constitution-makers.

[Tomas] Jefferson believed that the United States was a chosen nation with a special responsibility to spread democracy around the world.

[John Adams] letters courting Abigail Smith are especially priceless. In one of 1764 he addresses her as "Miss Adorable" and says that "By the same Token that the Bearer hereof satt up with you last night I hereby order you to give him, as many Kisses, and as many Hours of your Company after 9 O'Clock as he shall please to Demand and charge them to my Account."

[John] Adams identified himself with the political theories of [James] Harrington, [John] Locke, and [Charles-Louis] Montesquieu, whose ideas of constitutionalism, he believed, were applicable to all peoples everywhere; they were his contribution to what he called "the divine science of politics."

Again and again [Tomas] Jefferson deftly sidesteps many of [John] Adams's often provocative remarks. They both felt the correspondence, which was written for posterity, was too important to risk by being too candid with one another.