The Eternal Word was communicated in the OldTestament by the Eternal HolySpirit to the prophets who communicated it to the people.

But the NewTestament is about the Eternal HolySpirit being poured into every person who believes and receives Jesus as MightyGod, Saviour, Lord and King. It is about the Eternal Word filling our minds so that they are renewed to the MindOfChrist.