4 Bible Verses about Inward Fire

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.

And they said one to another, Did not our heart burn within us, while he talked with us by the way, and while he opened to us the scriptures?

I am come to send fire on the earth; and what will I, if it be already kindled?

My heart was hot within me, while I was musing the fire burned: then spake I with my tongue,