'Continue' in the Bible

“For My people are stupid and foolish,” [says the Lord to Jeremiah];“They do not know Me;They are foolish childrenAnd have no understanding.They are shrewd [enough] to do evil,But they do not know [how] to do good.”

The bellows blow fiercely,The lead is consumed by the fire;In vain they continue refining,But the wicked are not separated and removed.

How long [shall this state of affairs continue]? Is there anything in the hearts of the prophets who prophesy falsehood, even these prophets of the deception of their own heart,