What does the theme of fire represent in Medea?

I am not sure if "fire" is a theme in the play.  I think
that "fire" can be a concept or a symbol in displaying Medea's rage and her intensity of
emotion.  "Fire" can be a symbol for her vengeance.  The idea of a fire as something to
provide warmth and, from an emotional sense, motivation can be applied to Medea.  This
emotional understanding of fire is one where she refuses to be taken advantage of and
refuses to be overlooked.  Yet, when uncontrolled and with added fuel, fire can be
destructive.  When Medea lets her jealous rage and wrath overtake her, the results are
disastrous.  When the Chorus indicates that action has to be taken, deliberately or not,
fuel is added to this emotional fire of Medea.  When fires become uncontrolled they take
everything in their path until their own life is extinguished and this is seen when
Medea kills her own children.  There is a human representation of fire when Medea tells
Jason that her "vengeance was worth the pain."  The ending of the play is a visual
representation of fire in human form through Medea.