How can mortality be the creation of the Shaper in chapter 4 in grendel?

In Chapter 4 of "Grendel," the Shaper's creation of mortality refers to the idea that he uses stories and myths to give meaning to life and death. By crafting narratives that explain the cycle of life, death, and the afterlife, the Shaper imbues mortality with a sense of purpose and inevitability in the minds of the people. This creation of meaning through storytelling is a way for the Shaper to control and shape the beliefs and behaviors of the society.