When the interests of one country interfere with those of another, we estimate the merits of a statesman by the good or ill, which results to his own country from his measures and councils, without regard to the prejudice which he brings on its enemies and rivals. His fellow-citizens are the objects, which lie nearest the eye, while we determine his character.
 David Hume, An Enquiry Concerning the Principles of Morals (1751). copy citation

Context

“In proportion to the station which a man possesses, according to the relations in which he is placed; we always expect from him a greater or less degree of good, and when disappointed, blame his inutility; and much more do we blame him, if any ill or prejudice arise from his conduct and behaviour. When the interests of one country interfere with those of another, we estimate the merits of a statesman by the good or ill, which results to his own country from his measures and councils, without regard to the prejudice which he brings on its enemies and rivals. His fellow-citizens are the objects, which lie nearest the eye, while we determine his character. And as nature has implanted in every one a superior affection to his own country, we never expect any regard to distant nations, where a competition arises. Not to mention, that, while every man consults the good of his own community, we are sensible, that the general interest of mankind is better promoted, than any loose indeterminate views to the good of a species, whence no beneficial action could ever result, for want of a duly limited object, on which they could exert themselves.]” source