Psalms 21:1-13
1 The king shall joy in thy strength, O LORD; and in thy salvation how greatly shall he rejoice!
2 Thou hast given him his heart's desire, and hast not withholden the request of his lips. Selah.
3 For thou preventest him with the blessings of goodness: thou settest a crown of pure gold on his head.
4 He asked life of thee, and thou gavest it him, even length of days for ever and ever.
5 His glory is great in thy salvation: honour and majesty hast thou laid upon him.
6 For thou hast made him most blessed for ever: thou hast made him exceeding glad with thy countenance.
7 For the king trusteth in the LORD, and through the mercy of the most High he shall not be moved.
8 Thine hand shall find out all thine enemies: thy right hand shall find out those that hate thee.
9 Thou shalt make them as a fiery oven in the time of thine anger: the LORD shall swallow them up in his wrath, and the fire shall devour them.
10 Their fruit shalt thou destroy from the earth, and their seed from among the children of men.
11 For they intended evil against thee: they imagined a mischievous device, which they are not able to perform.
12 Therefore shalt thou make them turn their back, when thou shalt make ready thine arrows upon thy strings against the face of them.
13 Be thou exalted, LORD, in thine own strength: so will we sing and praise thy power.
The battle is over, the victory is won, and the assembled people sing the song of victory. This song, while it celebrates one victory, runs beyond it and praises Jehovah for all He has done for the king. They had prayed, "Grant thee thy heart's desire" (20:4). The prayer is answered and now they sing, 'Thou hast given him his heart's desire" (21:2). They had sung of victory because their trust was in the name of Jehovah (20:7,8). Victory has been won and now they celebrate it (21:7-12).
The contrast is very vivid between the king trusting in Jehovah and therefore sustained, supplied, and led in triumph; and the enemies who intended evil against Jehovah and who are swallowed up and destroyed and utterly overcome. From the experience of the king the whole nation learns its lesson. The opening declaration, "The king shall joy in Thy strength," issues in the final prayer, "Be Thou exalted, 0 Jehovah, in Thy strength: so will we sing and praise Thy power."
Again let us remember our conflict is spiritual and still the ancient hymn is ours, for our King also triumphed through the strength of Jehovah and to our final victories we follow in His train.