This chapter begins with a prophecy that is a continuation of the prophecy concluding the previous chapter. Some translations set each line of poetry farther to the right than the rest of the text to make it easier to read. The ULB does this with the poetry in 9:1-21. (See: [[rc://en/tw/dict/bible/kt/prophet]])
The prophecy in 9:1-7 is about the coming Messiah. Parts of this prophecy were fulfilled when he first came to earth. Other parts are to be fulfilled when he will return in glory to earth. (See: [[rc://en/tw/dict/bible/kt/christ]] and [[rc://en/tw/dict/bible/kt/fulfill]])
Some of the prophecies in this chapter were fulfilled in Isaiah's lifetime while others are fulfilled in the distant future. Some scholars believe that there can be multiple fulfillments of each of these prophecies, while others see only one complete fulfillment.