1 Comfort, comfort now my people;
speak of peace: so says our God.
Comfort those who sit in darkness,
mourning under sorrow’s load.
Cry out to Jerusalem
of the peace that waits for them;
tell her that her sins I cover
and her warfare now is over.
2 For the herald’s voice is crying
in the desert far and near,
calling all to true repentance,
since the kingdom now is here.
Oh, that warning cry obey!
Now prepare for God a way!
Let the valleys rise to meet him
and the hills bow down to greet him.
3 Then make straight what long was crooked;
make the rougher places plain.
Let your hearts be true and humble,
as befits his holy reign.
For the glory of the Lord
now on earth is shed abroad,
and all flesh shall see the token
that God’s word is never broken.
This song is a versification of Isaiah 40:1-5, the passage that opens the final large group of prophecies in Isaiah 40-66. Many of these prophecies express consolation and hope that Judah's exile in Babylon is almost over. That is certainly the tone of 40: 1-5-words of comfort forecasting a new reign but also words that call for proper preparation–that is, repentance.
This biblical text opens the second section of prophecies by Isaiah (ch 40-66), which is characterized by offers of consolation and further calls to repentance.