Isaiah 2.3

Many people shall come and say, "Come let us go up to the mountain of the Lord, to the house of the God of Jacob; that he may teach us his ways and that we may walk in his paths."

This is a deceptive verse. It looks straightforward, but the writer, known as "1st Isaiah," is taking Judah to task for their rebellion and religious superficiality against God. He is telling them they are ignoring the consequences of past rebellious behavior. Judah can, of course, repent and return; however, should they not, the consequences will be destruction [and, since we have the good fortune of hindsight, this is what occurred]. Jerusalem, toward which we are walking, is lamented for its sin.

What this section is saying is, even with all this, God will not give up. Out of the destruction will come a time, a "new age" [before this became a trite catchword] wherein God's reign will be recognized by all and there will be peace.

God will not give up. There will be peace. That's good news.