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 my heart as a burning fire shut up in my bones, and I was weary from holding it back, and I could not.

And they said one to another, Did not our hearts 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 would that it were already kindled?

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