7 I will tell of the decree: the Lord said to me, “You are my Son; today I have begotten you. 8 Ask of me, and I will make the nations your heritage, and the ends of the earth your possession. 9 You shall break them with a rod of iron and dash them in pieces like a potter’s vessel.”
Act 3: Christ speaks. The Word of the Lord is here recounted by Christ himself. According to Paul, this decree was fulfilled in Christ’s resurrection and enthronement in heaven (Acts 13:33). This “generation” of Christ does not have to do with his coming into existence, but with his coming into possession of a universal reign.
Confirming this are the subsequent words of the Lord which grant to Christ “every power … in heaven and on earth” (Mt. 28:18). Whether they want to or not, the very nations which opposed him will become subject to him. The imagery of the rod of iron that smashes earthen pots in pieces conveys the idea of decisive judgment in response to the rebellion of the nations. In terms of the whole sweep of the biblical narrative, however, this judgment ultimately serves to fulfill God’s redemptive purpose to bless all the families of the earth (Gen. 12:3, 49:10). The final goal of judgment is to put the world into order, and to this end it must sweep away all that contributes to disorder.
Incredibly, Christ will grant his saints to participate in his authority over the earth at the time of his return (Ps. 149:6-9; Rev. 2:26-27; 19:15). Meantime, those who are seated with Christ on his heavenly throne in virtue of their union with him can intercede on behalf of the nations, asking God to make them Christ’s inheritance in salvation (Eph. 2:6).
10 Now therefore, O kings, be wise; be warned, O rulers of the earth. 11 Serve the Lord with fear, and rejoice with trembling. 12 Kiss the Son, lest he be angry and you perish in the way, for his wrath is quickly kindled. Blessed are all who take refuge in him.
Act 4: The worshipper speaks. With his final exhortations, the psalmist challenges our concept of worship. Remembering that this psalm, like all the psalms, is a song to be used in worship, we must conclude that worship such as this has teeth, playing a vital role in the spiritual warfare to which the church is called. This is worship that commands what it proclaims — worldwide submission of every creature in heaven and earth to Jesus Christ — and that warns of the judgment which will fall upon those who stubbornly refuse to do so.
At the same time, this is worship that announces the joyful message of salvation: he who judges is also our refuge from judgment. Far from being contrary to his love, God’s judgment revealed in Christ is a manifestation of his love. The wrath of God is the form that his love assumes when its loving purpose is threatened by sin. Judgment is God’s refusal to accept the refusal of humanity. He judges because he loves, and he loves by means of his judgment.
To a Lord such as this, the right response is twofold: rejoice with trembling! Paradoxical though it may seem, this is the only possible response. The fact that Christ is the only righteous man means that the rest of us are all unrighteous and deserving of judgment. Ma this fact also means that whoever takes refuge in him will be justified, shielded in the shadow of his own perfect righteousness.