Our God is a consuming fire

See that ye refuse not him that speaketh. For if they escaped not who refused him that spake on earth, much more shall not we escape , if we turn away from him that speaketh from heaven: Whose voice then shook the earth: but now he hath promised, saying, Yet once more I shake not the earth only, but also heaven.  And this word , Yet once more, signifieth the removing of those things that are shaken, as of things that are made, that those things which cannot be shaken may remain. Wherefore we receiving a kingdom which cannot be moved, let us have grace, whereby we may serve God acceptably with reverence and godly fear: For our God is a consuming fire. Hebrews 12:25-29