“Patriotism is the exact opposite of nationalism”

"Notes on Nationalism" (1945)
Context: By "nationalism" I mean first of all the habit of assuming that human beings can be classified like insects and that whole blocks of millions or tens of millions of people can be confidently labelled "good" or "bad." But secondly — and this is much more important — I mean the habit of identifying oneself with a single nation or other unit, placing it beyond good and evil and recognizing no other duty than that of advancing its interests. Nationalism is not to be confused with patriotism. Both words are normally used in so vague a way that any definition is liable to be challenged, but one must draw a distinction between them, since two different and even opposing ideas are involved. By "patriotism" I mean devotion to a particular place and a particular way of life, which one believes to be the best in the world but has no wish to force on other people. Patriotism is of its nature defensive, both militarily and culturally. Nationalism, on the other hand, is inseparable from the desire for power. The abiding purpose of every nationalist is to secure more power and more prestige, not for himself but for the nation or other unit in which he has chosen to sink his own individuality.

This was not Wordsworth's viewpoint at all. The words are in fact those of Bertrand Russell in his Sceptical Essays (1928), p. 157.
Misattributed

Czar Nicholas II
1905
Collected Tales, Sketches, Speeches, & Essays, 1891-1910 (1992) ed. Louis J. Budd

Sylvia's Lovers, ch. 1 (1863)

As quoted in Brighter Than a Thousand Suns : A Personal History of the Atomic Scientists (1958) by Robert Jungk, as translated by James Cleugh, p. 22
Anecdotally, when Oppenheimer was working at Göttingen, Dirac supposedly came to him one day and said: "Oppenheimer, they tell me you are writing poetry. I do not see how a man can work on the frontiers of physics and write poetry at the same time. They are in opposition. In science you want to say something that nobody knew before, in words which everyone can understand. In poetry you are bound to say... something that everybody knows already in words that nobody can understand."

John Bright to Lord Rosebery in 1886, after asking him whether he had read about Palmerston's policies at the Foreign Office. (The Fifth Earl of Rosbery's journal, 17 March 1886)