Theodoret of Cyrus
At the conclusion of this message, the Lord directs the Prophet to go (Jer. 18:1) "into the house of the potter." The Prophet follows the command and observes the potter shaping a vessel. When the vessel collapses and shatters, the potter begins to reshape it. For it is written, Jer. 18:4, "And the vessel fell, and was broken; and he made it again into another vessel, as seemed good to the potter to make it." This illustrates that the potter has dominion over the clay and can mold it according to his desire. Therefore, God instructs the prophet to declare to them: