"People of Zion, who live in Jerusalem, you will weep no more. How gracious he will be when you cry for help! As soon as he hears, he will answer you." NIV translation
Now, Isaiah speaks of the situation that faces Jerusalem and he basically says that they do not have to suffer the same fate as the northern kingdom. He reminds them of God's promise of grace if they would simply turn to Him and trust only in Him. Isaiah goes on to say that they won't even have to wait for "God's timing" but reminds them that he was prepared to immediately act on their behalf. This is a reminder to us that "waiting on the Lord" does not always mean it will be some period of time before He answers. Sometimes, it means turning to Him first for the answer instead of using faith as a sort of backup plan.
"Although the Lord gives you the bread of adversity and the water of affliction, your teachers will be hidden no more; with your own eyes you will see them. Whether you turn to the right or the left, your ears will hear a voice behind you, saying, 'This is the way; walk in it.'" NIV translation
Once the people turned back to the Lord, they would be able to hear and understand the words of the Lord as delivered by His prophets. This is a big contrast to the northern kingdom where they were told to keep quiet. It is a reminder to us as well that God will not force us to listen and do what He says but He will give us the direction and the ability to make a choice.
"Then you will desecrate your idols overlaid with silver and your images covered with gold; you will throw them away like a menstrual cloth and say to them, 'Away with you!'" NIV translation
The first thing that the people do once they are able to hear the words of God again is to throw out their idols. This is due to the fact that they realize that God is holy (set apart) and that He does not share His place with anything.