Fire
Fire, in the spiritual sense, can mean either love or hatred depending on the context, just as natural fire can be either comforting in keeping you warm, or scary in burning down your house. Our language reflects this, too -- we use concepts like a smoldering hatred or a burning love. So fire signifies a love, either a good love of the neighbor and to the Lord, or, in a bad sense, selfish love of oneself that, if unchecked by conscience, leads to hatred of anyone that opposes it.
Ezekiel 16:28-29
28
You have played the prostitute also with the Assyrians, because you were insatiable; yes, you have played the prostitute with them, and yet you weren't satisfied.
29
You have moreover multiplied your prostitution to the land of merchants, to Chaldea; and yet you weren't satisfied with this.
