'Fire' in the Bible

“Oh, that there were even one among you [whose duty it is to minister to Me] who would shut the gates, so that you would not kindle fire on My altar uselessly [with an empty, worthless pretense]! I am not pleased with you,” says the Lord of hosts, “nor will I accept an offering from your hand.

But who can endure the day of His coming? And who can stand when He appears? For He is like a refiner’s fire and like launderer’s soap [which removes impurities and uncleanness].