Messages We Ignore

Rashi on the very first pasuk of the Megillah stops at one small word, "he," and says Achashveirosh stayed the same from beginning to end. Why make a point of that, and why single out Achashveirosh when Chazal rarely do this? A comment that sounds like a note about a king turns into a message for Purim, with the help of the Rambam's two things that move a person to change. Purim asks a quiet question about the signals in our own lives.