Trick-or-treating—setting off on Halloween night in costume and ringing doorbells to demand treats—has been a tradition in the United States and other countries for more than a century. Its origins remain murky but traces can be identified in ancient Celtic festivals, early Roman Catholic holidays, medieval practices—and even British politics. What surprised you about this paragraph?
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What surprised me about this paragraph was that the Halloween tradition has ancient Celtic origins.

The main themes of the play are: fate and free will with the inevitability of oracular predictions is a theme that often occurs in greek tragedies the conflict between the individual and the state similar to that in sophocles’ “antigone” and   people’s willingness to ignore painful truths both oedipus and jocasta clutch at unlikely details in order to avoiding facing up to the inceasingly apparent truth and sight and blindness the irony that the blind seer tiresius can actually “see” more clearly than the supposedly clear-eyed oedipus, who is in reality blind to the truth about his origins and his inadvertent crimes.