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.
Luke 21:8-11
8
He said, "Watch out that you don't get led astray, for many will come in my name, saying, 'I am he,' and, 'The time is at hand.' Therefore don't follow them.
9
When you hear of wars and disturbances, don't be terrified, for these things must happen first, but the end won't come immediately."
10
Then he said to them, "Nation will rise against nation, and kingdom against kingdom.
11
There will be great earthquakes, famines, and plagues in various places. There will be terrors and great signs from heaven.
