What does it mean to become one’s own worst enemy, and how is this depicted through the choices and consequences that the characters in Matheson’s stories make?

How does Matheson make use of cruel ironies to demonstrate The Devastating Effects of Selfishness? Use at least three concrete examples to support your interpretation.

Compare and contrast the tone of “The Creeping Terror” with that of “Mute.” How does the stylistic flexibility of Matheson’s writing enhance the mood, setting, and characters of each story?