Most expositors recognise a choral structure in the psalm, as in several others of this date, as would be natural at the time of the reorganization of the public musical service. Probably we may gain the key to its form by supposing it to be a processional hymn, of which the first half was to be sung during the ascent to the city of David, and the second while standing before the gates. We have then to fancy the long line of worshippers climbing the rocky steep hill-side to the ancient fortress so recently won, the Levites bearing the ark, and the glad multitude streaming along behind them. First there swells forth from all the singers the triumphant proclamation of God's universal sovereignty, "The earth is the Lord's and the fulness thereof; the world and they that dwell therein. For He hath founded it upon the seas and established it upon the floods." It is very noteworthy that such a thought should precede the declaration of His special dwelling in Zion. It guards that belief from the abuses to which it was of course liable--the superstitions, the narrowness, the contempt of all the rest of the world as God-deserted, which are its perversion in sensuous natures. If Israel came to fancy that God belonged to them, and that there was only one sacred place in all the world, it was not for want of clear utterances to the contrary, which became more emphatic with each fresh step in the development of the specializing system under which they lived. The very ground of their peculiar relation to God had been declared, in the hour of constituting it to be--"all the earth is Mine" (Exod. xix. 5). So now, when the symbol of His presence is to have a local habitation in the centre of the national life, the psalmist lays for the foundation of his song the great truth, that the Divine presence is concentrated in Israel, but not confined there, and concentrated in order that it may be diffused. The glory that lights the bare top of Zion lies on all the hills; and He who dwells between the cherubim dwells in all the world, which His continual presence fills with its fulness, and upholds above the floods. Then, as they climb, a single voice perhaps chants the solemn question, "Who shall ascend the hill of the Lord, or who shall stand in the place of His holiness?"