We have listened to three voices, and now, in vv. 10-12, the poet speaks in solemn exhortation: "Be wise now, ye kings." The "now" is argumentative, not temporal. It means "since things are so." The kings addressed are the rebel monarchs whose power seems so puny measured against that of "my King." But not only these are addressed, but all possessors of power and influence. Open-eyed consideration of the facts is true wisdom. The maddest thing a man can do is to shut his eyes to them and steel his heart against their instruction. This pleading invitation to calm reflection is the purpose of all the preceding. To draw rebels to loyalty, which is life, is the meaning of all appeals to terror. God and His prophet desire that the conviction of the futility of rebellion with a poor "ten thousand" against "the king of twenty thousands" should lead to "sending an embassage" to sue for peace. The facts are before men, that they may be warned and wise. The exhortation which follows in vv. 11, 12 points to the conduct which will be dictated by wise reception of instruction. So far as regards ver. 11 there is little difficulty. The exhortation to "serve Jehovah with fear and rejoice with trembling" points to obedience founded on awe of God's majesty,--the fear which love does not cast out, but perfect; and to the gladness which blends with reverence, but is not darkened by it. To love and cleave to God, to feel the silent awe of His greatness and holiness giving dignity and solemnity to our gladness, and from this inmost heaven of contemplation to come down to a life of practical obedience--this is God's command and man's blessedness.