This quote is talking about the terrifying unpredictability of love. The phrase “love is a fire” is used to show the strong, passionate emotion associated with love. The quote goes on to explain that, like a real fire, you can never be sure whether it will have a positive or negative effect. Too much love can lead to chaos, just like a wild fire can quickly destroy a house. But, a gentle fire can also be used to provide warmth, just like a loving relationship can bring someone joy.