In Jeremiah 2, the words are harsh. The Lord asks what the people found wrong with God that made them go after other things. The verse says that because they went after worthlessness, they became worthless. This is blunt. This is harsh. This is difficult to swallow.
It is hard to read this truth and feel any grace. The reason the people had become worthless is because they were deep in idolatry. They could not be used by God for His glory if they were running after other things. It is difficult for you to selfishly and foolishly run toward something in place of God and be used by God for great things for His glory. At the end of the day, not only is it a choice that will be regrettable, but it is also very unfruitful.
Verse 11 makes it clear that this way of living does not profit. The people, His people (note “my people”), decided to cast aside their specialness. They were a chosen people. They cast it aside for something else. The something else was not better. Rather, this action caused them to settle for something that would lead them nowhere good, nowhere they would want to be if they knew the truth. Today, look within. Are you useful? Are you fixated on other things? Imagine what God can do through you for His glory.
“Thus says the LORD: ‘What wrong did your fathers find in me that they went far from me, and went after worthlessness, and became worthless? Has a nation changed its gods, even though they are no gods? But my people have changed their glory for that which does not profit.’” – Jeremiah 2:5, 11 [ESV]