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 12:51-53
51
Do you think that I have come to give peace in the earth? I tell you, no, but rather division.
52
For from now on, there will be five in one house divided, three against two, and two against three.
53
They will be divided, father against son, and son against father; mother against daughter, and daughter against her mother; mother-in-law against her daughter-in-law, and daughter-in-law against her mother-in-law."
