How well fitted Jerusalem then was to be the world's watchtower, the traveller may see to this day. The city lies upon the great central ridge of Palestine, at an elevation of two thousand five hundred feet above the level of the sea. If you ascend the hill behind the city, you stand upon one of the great view-points of the earth. It is a forepost of Asia. To the east rise the red hills of Moab and the uplands of Gilead and Bashan, on to which wandering tribes of the Arabian deserts beyond still push their foremost camps. Just beyond the horizon lie the immemorial paths from Northern Syria into Arabia. Within a few hours' walk along the same central ridge, and still within the territory of Judah, you may see to the north, over a wilderness of blue hills, Hermon's snowy crest; you know that Damascus is lying just beyond, and that through it and round the base of Hermon swings one of the longest of the old world's highways--the main caravan road from the Euphrates to the Nile. Stand at gaze for a little, while down that road there sweep into your mind thoughts of the great empire, whose troops and commerce it used to carry. Then, bearing these thoughts with you, follow the line of the road across the hills to the western coastland, and so out upon the great Egyptian desert, where you may wait till it has brought you imagination of the southern empire to which it travels. Then, lifting your eyes a little further, let them sweep back again from south to north, and you have the whole of the west, the new world, open to you, across the fringe of yellow haze that marks the sands of the Mediterranean. It is even now one of the most comprehensive prospects in the world. But in Isaiah's day, when the world was smaller, the high places of Judah either revealed or suggested the whole of it.