" An aha experienced decades ago by one of us is relevant to this point. Halfway through a grueling clinical internship, CP [Christopher Peterson] complained to his supervisor, “No one [meaning the patients] ever says thank you for anything I try to do.” The response from the experienced psychiatrist stopped CP mid-whine: “If they [the patients] could say thank you, how many of them do you think would be in a psychiatric hospital? "
― , Character Strengths and Virtues: A Handbook and Classification