Jeremiah 29:11 was not written to comfortable people. It was written to exiles β people who had lost their city, their temple, and their entire frame of reference. God's announcement of purpose came to people who had every reason to believe purpose had ended. That is exactly the kind of person this verse is for.
Charismatic theology holds that purpose is not discovered through introspection but through encounter. Romans 8:28 promises that all things work together for good to those called according to his purpose β but notice the sequence. The calling precedes the working. You do not earn a purpose by figuring yourself out. You receive it because God already knows what he made you for.
Proverbs 16:3 offers the key to alignment: commit your works to the Lord, and your thoughts shall be established. The Hebrew word for established (kun) means to be fixed, made firm, prepared. Your thinking does not establish itself. It gets established when you bring your actions under God's authority. Purpose becomes clear through submission, not through planning alone.
Commentary is from a charismatic Protestant perspective, drawing on KJV text and public-domain sources including Spurgeon, Andrew Murray, and Matthew Henry.