He continues with this promise by proclaiming that it's time to give thanks to the Lord and to ask to be saved.
The Lord's promise is to bring home those who have been scattered. Included in the promise is those who have had a hard time making it to their new home without help--specifically, the blind, the lame, the pregnant.
Like the blind man in Mark's gospel, these who are called will come.
Isaiah then Mark promised return, restoration, inclusion. Today, the church can continue to make this promise and to act it out. We can look at those people who have become excluded, separated, even lost, and figure out how to reach them with our message of inclusion, and, as importantly, figure out how to make our promise true.