Analysis of Invocation

The Spirit of Darkness, the Prince of the Power of the Air,
The terror that walketh by night, and the horror by day,
The legions of Evil, alert and awake and aware,
Press round him each hour; and I pray here alone, far away.

God! call up Thy legions to fight on the side of my love,
Let the seats of the mighty be cast down before him, O Lord,
Send strong wings of angels to shield him beneath and above,
Let glorious Michael unsheath his implacable sword.

Let the whole host of Heaven take part with my dear in his fight,
That the armies of Hell may be scattered like chaff in the blast,
And the trumpets of Heaven blow fair for the triumph of Right.
Inspire him, protect him, and bring him home victor at last.

But if--ah, dear God, give me strength to withhold nothing now! -
If the life of my life be required for Thy splendid design,
Give his country the laurels, though cold and uncrowned be his brow
. . .
Thou gavest Thy Son for the world, and shall I not give mine?