"Yes, love indeed is light from heaven;A spark of that immortal fire.With angels shared, by Alla given,To lift from earth our low desire."- Lord Byron, The Giaour, 1813
The flame as a metaphor for love has been used in many artistic connotations. A candle flame can be used to light another candle, and so on and so forth and each flame burns with the same light and intensity as the other. Love is also also compared to burning coals, deep and intense.
"Love is a fire.It burns everyone.It disfigures everyone.It is the world's excusefor being ugly." - Leonard Cohen, The Energy of Slaves, 1972
One of the most sustained metaphors in literature pertaining to love, is the self-destruction of the moth in the flames of the undying love.
"A moth flying in black darkness
Found a yellow flame flickering
over a red candlestick
On a brass plate
Bright in the darkness
And the moth was pleased
At the beauty of it
And flew around it
And the moth fell in love
With the flame."