What philosophy of life comes across in the Gilgamesh story?

In the Epic of Gilgamesh, the philosophy that comes to mind would be the mindset that life is not permanent. When Gilgamesh tried to search for the gift of immortality, the gods told him that man was not created to live forever. One of the gods told Gilgamesh to live life to the fullest. The philosophy of life claims that life is not forever. Nothing is forever. Therefore, life is to be appreciated and enjoyed as much as possible until the end. I think that it is very interesting how the gods told Gilgamesh that life is not permanent because it is very relatable to today. You never know when you are going to die, and we only live once. As a result, people should enjoy the life that they are given for the short amount of time that they have on this earth.