The modern patriotism, the true patriotism, the only rational patriotism is loyalty to the nation all the time, loyalty to the government when it deserves it.

Mark Twain (1835-1910) American writer [pseud. of Samuel Clemens]

“The Czar’s Soliloquy,” North American Review (Mar 1905)

Sometimes paraphrased: "Patriotism is supporting your country all the time, and your government when it deserves it."