Divine speech is through the mouth and heart.
Remembering the creative forces of spoken and written word have a power with two essential components.
The formation of the mind called perception which Egyptians view in the heart rather the brain.
And creative expression called annunciation.

These two were property of the gods and the king whom both could speak and it is done.

Effectiveness was the link between. Called heka. Possession of this power made the difference between a normal utterance and true creative force.