: The essay highlights the "spontaneous insights" Sagan experienced, some of which he later found to be valid and useful in his professional life after sobering up.
:Because "X" is the symbol for the unknown, "Mr. Xes" is often used by digital creators who wish to remain anonymous while providing commentary on society, finance, or culture. It represents a collective "everyman" who has seen the "excesses" of the world. mr xes