Enthusiasm originally meant inspiration or possession by a divine afflatus or by the presence of a god. Johnson's Dictionary, the first comprehensive dictionary of the English language, defines enthusiasm as "a vain belief of private revelation; a vain confidence of divine favour or communication." In current English vernacular the word simply means intense enjoyment, interest, or approval.

Originally, an enthusiast was a person possessed by a god. Applied by the Greeks to manifestations of divine possession, by Apollo (as in the case of the Pythia), or by Dionysus (as in the case of the Bacchantes and Maenads), the term enthusiasm was also used in a transferred or figurative sense. Socrates taught that the inspiration of poets is a form of enthusiasm.

Its uses were confined to a belief in religious inspiration, or to intense religious fervour or emotion. Thus, a Syrian sect of the 4th century was known as the Enthusiasts. They believed that "by perpetual prayer, ascetic practices and contemplation, man could become inspired by the Holy Spirit, in spite of the ruling evil spirit, which the fall had given to him". From their belief in the efficacy of prayer, they were also known as Euchites.

Lawrence Gene "Larry" David (born July 2, 1947) is an American actor, writer, comedian, and producer. He is best known as the co-creator (with Jerry Seinfeld), head writer, and executive producer of the television series Seinfeld from 1989 to 1996, and for creating the 1999 HBO series Curb Your Enthusiasm, a partially improvised sitcom in which he stars as a semi-fictionalized version of himself.

David's work won him a Primetime Emmy Award for Outstanding Comedy Series in 1993. Formerly a standup comedian, David went into television comedy, writing and starring in ABC's Fridays, as well as writing briefly for Saturday Night Live. He has won two Primetime Emmy Awards as well as being voted by fellow comedians and comedy insiders as number 23 of the greatest comedy stars ever in a British poll to select The Comedian's Comedian.

Lawrence Gene David was born to a Jewish family in the neighborhood of Sheepshead Bay in Brooklyn, New York. He graduated from Sheepshead Bay High School and then the University of Maryland, with a bachelor's degree in history (1969), and then in business (1970). After college, David enlisted in the Air National Guard.

Curb Your Enthusiasm is an American comedy television series produced and broadcast by HBO, which premiered on October 15, 2000. As of 2011, it has completed 80 episodes over eight seasons. The series was created by Seinfeld co-creator Larry David, who stars as a fictionalized version of himself. The series follows David in his life as a semi-retired television writer and producer in Los Angeles and later New York City. Also starring are Cheryl Hines as David's wife Cheryl, Jeff Garlin as David's manager Jeff, and Susie Essman as Jeff's wife Susie. Curb Your Enthusiasm often features guest stars, and many of these appearances are by celebrities playing versions of themselves fictionalized to varying degrees.

The plots and subplots of the episodes are established in an outline written by David and the dialogue is largely improvised by the actors themselves. Much like Seinfeld, the subject matter in Curb Your Enthusiasm often involves the minutiae of daily life, and plots often revolve around Larry David's many faux pas, and his problems with certain social conventions and expectations, as well as his annoyance with other people's behavior. The character has a hard time letting such annoyances go unexpressed, which leads him often into awkward situations.