As the very first words go deep into the meaning of all God's voices, and unveil the permanence of His relation of love even to sinful and punished men, so the next disclose the tender manner of His approach to us, and prescribe the tone for all His true servants: 'Speak ye to the heart of Jerusalem,' with loving words, which may win her love; for is she not the bride of Jehovah, fallen though she be? And is not humanity the beloved of Jesus, in whom God's heart is unveiled that our hearts may be won? How shall human voices be softened to tenderness worthy of the message which they carry? Only by dwelling near enough to Him to catch the echoes, and copy the modulations, of His voice, as some birds are taught sweeter notes than their own. The prophet's charge is laid upon all who would speak of Christ to men. Speak to the heart, not only to the head or to the conscience. God beseeches in the person of His 'ambassadors.' The substance of the message may well find its way to the heart; for it is the assurance that the long, hard service of the appointed term of exile is past, that the sin which brought it about is forgiven, and, more wonderful and gracious still, that God's mercy reckons that the ills which followed on faithlessness have more than expiated it. We need not seek for any other explanation of these startling words than the exuberance of the divine pity, which 'doth not willingly afflict.'
Of course, the captivity is in the foreground of the prophet's vision; but the wider sense of the prophecy embraces the worse captivity of sin under which we all groan, and the divine voice bids His prophets proclaim that Jehovah comes, to set us all free, to end the weary bondage, and to exact no more punishment for sins.
II. The forerunner speaks. There is something very impressive in the abrupt bursting in of this second voice, all unnamed. It is the reverberation, as it were, of the former, giving the preparation on the side of man for the coming of Jehovah. Israel in bondage in Egypt had been delivered by Jehovah marching through the wilderness, a wilderness stretched between Babylon and Jerusalem; these supply the scenery, so to speak; but the scenery is symbolic, and the call is really one to prepare the way of the Lord in the wilderness of human sin, by raising up the cast-down by reason of transgressions or sorrows, to subdue lofty thoughts and self-sufficiency by humble self-abnegation, to make the 'crooked things' or 'rugged things' straight or smooth, and the rough ground where heights were tumbled on heights a deep valley, by forsaking evil.
The moral preparation, not the physical, is meant. It was fitting that the road for such a coming should be prepared. But the coming was not so contingent on the preparation that the 'glory of the Lord' would not 'be revealed' unless men made a highway for Him. True, that the revelation of His glory to the individual soul must be preceded by such a preparation; but that raising of abjectness and levelling of loftiness needs some perception of Him ere it can be done by man. Christ must come to the heart before the heart can be prepared for His coming. John the Baptist came crying in the wilderness, but his fiery message did little to cast up a highway for the footsteps of the King. John's immovable humility pierced to the very heart of the prophecy when he answered the question 'Who art thou?' with 'I am a voice. The voice was unnamed; why, what does it matter who I am?'
The substance and the range of the coming manifestation are next defined. It is to be the revelation of 'the glory of the Lord,' and to be for all mankind, not for Israel only. That lowly life and that shameful death were a strange revelation of God's glory. If _they_ revealed it, then it cannot consist in power or any of the majestic 'attributes,' but in love, pity, and long-suffering. Love is the divinest thing in God. The guarantee for all lies simply here, that God has spoken it. It is because the unnamed herald's ear has heard the divine voice uttering the gracious assurances of verse 1, that _his_ voice is lifted up in the commands and assurances of verse 4. Absolute faith in God's utterances, however they seem to transcend experience, is wisdom and duty.