A (Very) short reply to Mr Joyce....
I have to agree with my fellow poster with regard to that most vital of abilities, "Situational awareness".
Mr Joyce wrote a very carefully constructed and extremely articulate, erudite and evocative resignation letter, indicating to me ( as an amateur astronomer ) that he is indeed most situationally aware,. . . .for someone in a stable orbit around Saturn, but...regrettably not representative of a normal, seriously thinking human being being lucky enough to be in close proximity to Earth.
Thank you Mr. Joyce, I feel certain that the nation owes you a debt of gratitude for your sterling service and will be collectively devastated at your departure.
JGF