Priests are those who hold the office of household servants. They learn and serve through rote repetition. They are given detailed instructions and ordered to perform a task but told very little about why they must do it. This is true of young children in a household. Memorization is key in the early years. This is the grammar stage of learning.
“No longer do I call you servants, for the servant does not know what his master is doing;”—John 15:15a
A king is one who has matured and is now able to exercise and incorporate wisdom into the way he makes important decisions. As children grow in their knowledge of facts, they grow in maturity and they begin to connect the dots and understand how facts fit together into a larger picture. This is the logic or dialectical phase of learning.
“And all Israel heard of the judgment that the king, (Solomon) had rendered, and they stood in awe of the king, because they perceived that the wisdom of God was in him to do justice.”—1 Kings: 3:28
Prophets (Rhetoric )
A prophet is one who speaks for God to the nations. He speaks and the world changes. When one has learned the basics and sees how the pieces fit into the bigger puzzle, he becomes able to speak as one who has wisdom. This the rhetorical stage in which the important truth of God is communicated to others.
“and the seven years of famine began to come, as Joseph had said. There was famine in all lands, but in all the land of Egypt there was bread. “—Genesis 41:54