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Friends, negotiations between: Negotiations between friends proceed from common interests and shared ends; the objective is to find a means of carrying out a common course of action to realize these ends. It si a great mistake to approach such negotiations in an adversarial manner. This can only risk raising questions about the extent to which interests are truly held in common and erode the sense of partnership that is the greatest hope for success in both the negotiations and the relationship they are intended to advance.
Friends, tending of:/ A first rule of foreign policy is to find out who your friends are and what their interests are, and then to help them along. If you don't, you must not be surprised if they ultimately decide to act without regard to your interests or fail to back you in times of need.
Friendship between nations, invaluable: Over time, relations between nations can become so affable, honest, and reflexive that it becomes virtually unthinkable for one to act on an important matter without seeking and taking into account the views of the other. Such a relationship with a stronger state is the rarest and most valuable possession of a weaker; it must be cherished and nurtured, and never jeopardized by unilateral action.
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Chas W. Freeman Jr. (The Diplomat's Dictionary)