If I say to an American that the country he lives in is a fine one, “Ay,” he replies, “there is not its equal in the world.” If I applaud the freedom that its inhabitants enjoy, he answers: “Freedom is a fine thing, but few nations are worthy to enjoy it.” If I remark on the purity of morals that distinguishes the United States, “I can imagine,” says he, “that a stranger, who has witnessed the corruption that prevails in other nations, would be astonished at the difference.” At length I leave him to the contemplation of himself; but he returns to the charge and does not desist till he has got me to repeat all I had just been saying. It is impossible to conceive a more troublesome or more garrulous patriotism; it wearies even those who are disposed to respect it.
Alexis DeTocqueville, American Democracy, Vol. II; Chapter XVI