What is the main effect of the narrator mentioning famous philosophers and scientists like sir isaac newton?

Karen often finds that tasks come up unexpectedly during her day, and she has trouble figuring out how to rearrange her schedule because she changes it daily.  what should karen do to prevent these unexpected tasks from disrupting her day

Messalla frowns at the wide circular cover, for a moment returning to his own fussy world.

What is the allure of fear? what have you learned from the story about portrayals of fear in literature?