2 Kings 4 --15

king Jehu stands out to Me as serving God will zeal but the heart was not fully "right " before God.

How is was it that he followed the Lord's command to destroy the house of Ahab, yet he did not depart from the sins of Jeroboam , who made Israel sin(2 Kings 10:29-31).

Lesson you can't follow God by cherry picking what you want to obey. We are called to do his works in His way. Doing the most or being extreme or zealous doesn't always equate to God's way.  I thought about the Apostle Paul being zealous in persecuting Christian.