Read Acts 8:34 againi thnk we are looking at it wrong, i dont think it was Jeremiah the man, it was the true self of Jeremiah.
The prophets spoke of things relating to Jesus. The acts 8 passage has more information than the verse I quoted.
If an ox can relate to a preacher, then s prophet can prophesy regarding Jesus.
I Peter 1:10 KJV
Of which salvation the prophets have inquired and searched diligently, who prophesied of the grace that should comeunto you:
The prophets did not understand all they spoke. The New Testament lets us understand the concept.
One tribe revers the Eagle another tribe the Herron. We have scripture to put us on the same page and revere the same thing.
eddif