Burns Like An Inward Fire.

Jeremiah 20:8-9 (KJV)
⁸  For since I spake, I cried out, I cried violence and spoil; because the word of the LORD was made a reproach unto me, and a derision, daily.
⁹  Then I said, I will not make mention of him, nor speak any more in his name. But his word was in mine heart as a burning fire shut up in my bones, and I was weary with forbearing, and I could not stay.