When fire is within us, we are consumed. Internal fire confronts the spiritual coldness in the world, but first confronts the spiritual coldness within our hearts. Jeremiah felt the fire. He answered the call. God within us does not consume us, and the world questions his genuine presence within us.
Fire can smolder for just so long, and it breaks forth.
The cold reception of the message in our world, a message that fails to consume hearts, is explained by the cold reception of the message in the church of Christ, the very people of God. The spiritual ignorance of our world is explained by the spiritual ignorance among us. A convicting call. We do not know how the prophet died, but we do know he was convicted and answered the call of God even in the face of death and persecution by his countrymen. A Jewish story accepted by early Christians says Jeremiah died in Taphnes, stoned by his own people.