Americans rightly think their patriotism is a sort of religion strengthened by practical service.

Alexis de Tocqueville (1805-1859) French writer, diplomat, politician

Democracy in America, Vol. 1, “Public Spirit of the Townships of New England” (1835)
    (Source)

Alt. trans.: "For in the United States it is believed, and with truth, that patriotism is a kind of devotion which is strengthened by ritual observance." [tr. Reeve (1839)]