Do we find O.T. evidence for the Trinity in Isaiah 48:16? Is the verse in fact talking about the Father, Son and Holy Spirit (cf. Mt. 28:19, John 14:16, 26, 15:26, Eph. 4:4-6)?

We know from verses in Isaiah like Isa. 11:2 & 61:1 that the Spirit of the LORD is the Holy Spirit. But can we prove the speaker of Isaiah 48:16 is in fact God Himself (not the prophet) and therefore we find an interaction within the Godhead of personal distinction? Was Jehovah sent by the Lord GOD and/or His Spirit?

The evidence that Isaiah 48:16 is God speaking is found contextually and in Isaiah 45:18-19 where God says the same key phrase. Is there ANY evidence that the prophet Isaiah was speaking instead? I don't find any.

The Lord being sent shouldn't surprise us in light of Genesis 19:24, the divine Angel of the LORD and the many passages which speak of the Son being sent from heaven by the Father.

If God is the speaker of Isaiah 48:16, which I think it clearly is, how can this verse be reconciled at all to every form of unitarianism? And why would God inspire His Word to include such an amazing verse like this?


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