If he takes wider observation of mankind, Jerusalem is his watch-tower. It is for her defence he battles through fifty years of statesmanship, and all his prophecy may be said to travail in anguish for her new birth. He was never away from her walls, but not even the psalms of the captives by the rivers of Babylon, with the desire of exile upon them, exhibit more beauty and pathos than the lamentations which Isaiah poured upon Jerusalem's sufferings or the visions in which he described her future solemnity and peace.
It is not with surprise, therefore, that we find the first prophecies of Isaiah directed upon his mother city: _The word that Isaiah the son of Amoz saw concerning Judah and Jerusalem._ There is little about Judah in these chapters: the country forms but a fringe to the capital.
Before we look into the subject of the prophecy, however, a short digression is necessary on the manner in which it is presented to us. It is not a reasoned composition or argument we have here; it is a vision, it is the word which Isaiah _saw_. The expression is vague, often abused and in need of defining. Vision is not employed here to express any magical display before the eyes of the prophet of the very words which he was to speak to the people, or any communication to his thoughts by dream or ecstasy. They are higher qualities of "vision" which these chapters unfold. There is, first of all, the power of forming an ideal, of seeing and describing a thing in the fulfilment of all the promise that is in it. But these prophecies are much more remarkable for two other powers of inward vision, to which we give the names of insight and intuition--insight into human character, intuition of Divine principles--_clear knowledge of what man is and how God will act_--a keen discrimination of the present state of affairs in Judah, and unreasoned conviction of moral truth and the Divine will. The original meaning of the Hebrew word _saw_, which is used in the title to this series, is to cleave, or split; then to see into, to see through, to get down beneath the surface of things and discover their real nature. And what characterizes the bulk of these visions is _penetrativeness_, the keenness of a man who will not be deceived by an outward show that he delights to hold up to our scorn, but who has a conscience for the inner worth of things and for their future consequences. To lay stress on the moral meaning of the prophet's vision is not to grudge, but to emphasize its inspiration by God. Of that inspiration Isaiah was himself assured. It was God's Spirit that enabled him to see thus keenly; for he saw things keenly, not only as men count moral keenness, but as God Himself sees them, in their value in His sight and in their attractiveness for His love and pity. In this prophecy there occurs a striking expression--_the eyes of the glory of God_. It was the vision of the Almighty Searcher and Judge, burning through man's pretence, with which the prophet felt himself endowed. This then was the second element in his vision--to penetrate men's hearts as God Himself penetrated them, and constantly, without squint or blur, to see right from wrong in their eternal difference. And the third element is the intuition of God's will, the perception of what line of action He will take. This last, of course, forms the distinct prerogative of Hebrew prophecy, that power of vision which is its climax; the moral situation being clear, to see then how God will act upon it.