Quote:
Likewise,
Isaiah 48:17 Thus saith the LORD, thy Redeemer, the Holy One of Israel; I am the LORD thy God which teacheth thee to profit, which leadeth thee by the way that thou shouldest go.
The red colored text is the speakers' words and He is talking about what the Lord said and not about Himself.
That makes the speaker not the Redeemer the speaker is talking about.
I never thought that you were suggesting that that the speaker was says "Thus says the lord". That is a description portion of the test written by the person who penned the book of Isaiah to identify who the speaker was. But that changes nothing because having identified the speaker, the same identification given in verse 12, you are left with the speaker being Jesus.