"We were with child, we writhed in labor, but we gave birth to wind. We have not brought salvation to the earth, and the people of the world have not come to life." NIV translation
For thousands of years, now, the Jewish people have suffered and struggled to be a holy people but all of the religious efforts are for nothing. This is a sad verse as it reminds us of a woman who carries a baby for nine months only to lose it when it is time for the baby to enter the world.
In the same way, the Jewish people were given the responsibility of being the people that would welcome the Messiah into the world but, at the time He entered, they did not accept Him.
The religious duties and practices could not bring eternal life to the people of the earth. Isaiah saw this and the fact that it will be recognized during the Millennial Reign of Jesus Christ.
We know that the purpose of the Law of Moses was to bring people to knowledge of the fact that no man is able to live up to that standard. It is then, that man can repent (turn away from) his own efforts to reach God and to trust in the finished work of Jesus.
"But your dead will live, Lord; their bodies will rise - let those who dwell in the dust wake up and shout for joy - your dew is like the dew of the morning; the earth will give birth to her dead." NIV translation
The song continues with rejoicing at the resurrection of the dead that are in Christ Jesus. In an instant, they will be revived and raised to eternal life with a new spiritual body. The Hebrew word that is translated as "dew" is "tal" and it speaks of a covering and, here, it is speaking of Jesus' shed blood on our behalf. The earthly dew settles on plants and provides them water that sustains them. In the same way, those who are covered by His blood will have a new life with a perfect body and will join in the celebration for all eternity. This resurrection is what Paul described in his letter to the believers in Corinth (see 1 Co. 15:52-54).