Jog your memory, tickle your brain, or guess
Who said this and when?
“Whatever policy we may lay down, the art of conducting the foreign affairs of a country lies in finding out what is most advantageous to the country. We may talk about international goodwill and mean what we say. We may talk about peace and freedom and earnestly mean what we say. But in the ultimate analysis, a government functions for the good of the country it governs and no government dares do anything, which in the short or long run is manifestly to the disadvantage of that country. Therefore whether a country is imperialist, socialist or communist, its foreign minister thinks primarily of the interests of that country.”
(No Googling, of course)