What were the main ideas in The Epic of Gilgamesh?

I think that one of the main ideas of The Epic
of Gilgamesh surrounds the journey of the hero with a specific purpose.  The
heroic journey is a critical idea in Gilgamesh's narrative.  In Gilgamesh's case, the
journey reveals aspects of his own identity and the need to right a wrong.  This is
something that becomes integral to the heroic myth, in that there has to be some type of
journey to reveal change on both external and internal levels.  Gilgamesh journeys to
discover his own true identity and that of mortality.  He journeys to avenge the death
of Enkidu.  Moreover, he journeys in order to struggle and to understand the nature of
struggle in the individual.  One of the critical ideas to come out out of The
Epic of Gilgamesh is this idea of how the journey changes us.  In some
respects, Gilgamesh might have been arrogant enough to think that he can change the
journey.  His belief in his own power, strength, and being leads him to this.  Yet, in
the end, it is the journey that changes him.  Gilgamesh comes to a more profound
understanding of self and this only happens as a result of the
journey.