I am a movie director and I just received the following movie plot. Could you help me answer this question? If not, let me know by writing "Not answerable".  Plot title: Dead Poets Society Movie plot: New England, the late 1950s. Todd Anderson (Ethan Hawke), a lonely and painfully shy teenager, who is under pressure by his stern parents because he must live up to his older brother's reputation to attend Yale and become a lawyer, arrives for the new semester at the Welton Academy for boys -- Todd's brother also attended Welton and was a popular and well-regarded student there. This semester begins during an orientation gathering with a speech given by the stern Headmaster Nolan (Norman Lloyd), who states the academy's four pillars: Tradition, Honor, Discipline, and Excellence. Todd meets Neil Perry (Robert Sean Leonard) an ambitious student whom becomes his dorm roommate.Later in his dorm, Neil is ordered by his grumpy and domineering father (Kurtwood Smith) to drop his involvement with the school annual in order to maintain good grades so the boy may become a doctor much as he has done. Neil is under pressure from his stern father's will. Also, Mr. Perry tells Neil that Mrs. Perry also wants him to become a doctor, which further worries the boy. A little later, Todd tells Neil that he is in a similar situation with his parents involving his older brother who also attended Welton a few years ago, graduated, and attended Yale Law School and became a lawyer and his parents want the exact same thing for him. But Todd does not have the courage to tell his parents that he instead wants to be a writer, not a lawyer.During the first day of classes Todd and Neil experience the various teaching methods which include speeches by the trig teacher, as well as the Latin teacher, and the math teacher who states that "all 20 questions at the end of the first chapter are due tomorrow". In stark contrast to these orthodox teaching methods, the guys see a different side of the school when they attend English class taught by the newly arrived (and liberal-minded) Mr. Keating (Robin Williams), whom they met briefly during the orientation -- Keating tells his class he was also a student at Welton ("Helton" as the students... My question: What was the Latin expression which John Keating summarized to his students?
The answer to this question is:
Carpe Diem