David Playfair Heatley, Diplomacy and the Study of International Relations (1919)
“ A Foreign Office and a Diplomatic Service are great instruments for preventing, as far as can be prevented, and diminishing, even when you cannot prevent, friction between States which are, or which ought to be, friendly: How is the task of peace-maker—because that is largely the task which falls to diplomatists and to the Foreign Office, which controls diplomatists—to be pursued if you are to shout your grievances from the housetop whenever they occur? ”
