The kingdom in relation to its subjects is the theme of ver. 3, which accords with the warlike tone of the whole psalm, by describing them as an army. The period spoken of is "the day of Thy host," or array--the time when the forces are mustered and set in order for battle. The word rendered _free-will offerings_ may possibly mean simply "willingnesses," and the abstract noun may be used as in "I am--prayer" (Psalm cix. 4)--_i.e._, most willing; but it is better to retain the fuller and more picturesque meaning of glad, spontaneous sacrifices, which corresponds with the priestly character afterwards ascribed to the people, and goes very deep into the essence of Christian service. There are to be no pressed men or mercenaries in that host. As Deborah sang of her warriors, these "offer themselves willingly." Glad consecration of self, issuing in spontaneous enlisting for the wars of the King, is to characterise all His subjects. The army is the nation. These soldiers are to be priests. They are clad in holy attire, "fine linen, clean and white." That representation goes as deep into the nature of the warfare they have to wage and the weapons they have to wield, as the former did into the impulse which sends them to serve under Messiah's flag. The priestly function is to bring God and man near to one another. Their warfare can only be for the carrying out of their office. Their weapons are sympathy, gentleness, purity. Like the Templars, the Christian soldier must bear the cross on his shield and the hilt of his sword. Another reading of this phrase is "on the holy mountains," which is preferred by many, among whom are Hupfeld and Cheyne. But the great preponderance of evidence is against the change, which obliterates a very striking and profound thought. Ver. 3_c_, _d_ gives another picture of the host. The usual explanation of the clause takes "youth" as meaning, not the young vigour of the King, but, in a collective sense, the assembled warriors, whom it paints as in the bloom of early manhood. The principal point of comparison of the army with the dew is probably its multitude (2 Sam. xvii. 12). The warriors have the gift of un-aging youth, as all those have who renew their strength by serving Christ. And it is permissible to take other characteristics of the dew than its abundance, and to think of the mystery of its origin, of the tiny mirrors of the sunshine hanging on every cobweb, of its power to refresh, as well as of the myriads of its drops.