What's the Use of Isaiah?

A command with the search Isaiah's words, third Nephi 23, 1 through 3. This is Jesus speaking through the Nephites. He uses ancient history as an allegory of the end time. There are many reasons like that, why the words of Isaiah are great. We're surely used to be able to touch all things concerning my people which are the house of Israel,. That's past, present and future.