Death is inevitableOne of the main themes in the epic is that death is inevitable, which is shown through Enkidu's death. When Enkidu dies, Gilgamesh becomes very worried, because he realizes for the first time that everyone is going to die at some point in time. The fact that Enkidu is a close friend makes it even more visible to Gilgamesh that everyone is mortal. Then, along with this realization, comes the theme of denial. Gilgamesh does not want to accept the fact that he will die. He denies the truth, because he does not want to think about the truth or cope with the tragedy that has struck him. "And he-he does not lift his head. 'I touched his heart, it does not beat'" (Tablet VIII, Column II, 15-16). "'Me! Will I too not die like Enkidu? Sorrow was come into my belly. I fear death; I roam over the hills. I will seize the road; quickly I will go to the house of Utnapishtim, offspring of Ubaratutu. I approach the entrance of the mountain at night. Lions I see, and I am terrified. I lift my head to pray to the mood god Sin: For...a dream I go to the gods in prayer: ...preserve me!'" (Tablet IX, Column I, 3-12).

Immortality is unachievableThe theme of death being inevitable leads to another theme, similar to the first. This is that immortality is unachievable, shown through similar examples as the first theme. Gilgamesh realizes that immortality is not obtainable after his quest for it. He discovers that the quest was pointless, because he will die regardless of the steps to prevent his death in the future. "'Never has a mortal man done that, Gilgamesh'" (Tablet IX, Column III, 8). "'The fate of mankind overtook him... In fear of death I roam the wilderness...Me, shall I not lie down like him, never again to move?'" (Tablet X, Column II, 3, 8, 13-14). "'From the beginning, there is no permanence'" (Tablet X, Column VI, 32).The heros journeyAlmost all of the action inGilgameshbegins with a journey. Enkidu journeys from the wilderness to Uruk and Gilgamesh. Gilgamesh and Enkidu journey to the Cedar Forest. Enkidu journeys to the underworld. Gilgamesh journeys to and then through the twin-peaked mountain Mashu. He journeys to Urshanabi to find Utnapishtim, then travels with Urshanabi across the sea and through the sea of death, only to return to Uruk. Gilgameshs many journeys mirror his internal journey to become a selfless and devoted king.