The first part of this chapter is probably a prophecy about the coming Messiah and not Isaiah because this was different than the message Isaiah delivered. (See: [[rc://en/tw/dict/bible/kt/christ]])
This chapter prophesies concerning a future time of peace and restoration. It is unlikely to have been fulfilled in Isaiah's day. (See: [[rc://en/tw/dict/bible/kt/restore]], [[rc://en/tw/dict/bible/kt/prophet]] and [[rc://en/tw/dict/bible/kt/fulfill]])