Again, agency is a key part of this as
@Johann has typed.
An agent now, doesn't have quite the same meaning as then, and particularly with Hebrew meaning.
So.. an agent working on behalf of another.. was 'as the man themselves'
So.. what the agent said.. it was taken to be who they represented said. Who they were an agent for.
This could mean two separate beings.. not related..but the Bible examples are of an agent ..Jesus, of the Father who Had the same attributes and power. The image of the Father.. God in human flesh..bodily expression of the Father etc..
That's why the Pharisees spoke of Him blaspheming. They knew this type of agency where the agent is seen as the one sending the agent.
It's not the same kind of agency we often think of for today.