Hezbollah is stronger than the Lebanese state in the arena that matters most: the ability to make war, to threaten Israel's north, and to drag an entire country into confrontation. That is precisely why diplomacy with Lebanon should not be dismissed as naive. It should be pursued soberly, forcefully, and without sentimentality.The emerging diplomatic effort is, by definition, imperfect. Any arrangement involving Lebanon will run up against a basic reality that has haunted every northern-front