“The contempt of risk and the presumptuous hope of success are in no period of life more active than at the age at which young people choose their professions,” wrote Adam Smith in 1776. “How little the fear of misfortune is then capable of balancing the hope of good luck.”

A young nobleman in ancient Athens fell in love with a statue of Agathe Tyche, goddess of good fortune. He hugged and kissed it, then offered the local council a large sum of money to purchase it. When his request was denied, he decorated the statue extravagantly with crowns and garlands, offered a sacrifice, uttered a lengthy lamentation, and killed himself.

A 2011 study found that Chinese consumers are charged more due to “superstitious manipulations” of retail prices—fives and sixes appear more often than unlucky fours, eights and nines more than unlucky sevens. “Retailers,” the study reported, “are the clear winners.”

Suetonius reported that Caligula often cheated when playing dice. The emperor once interrupted a game to go into the courtyard, where he spotted a group of rich knights passing. He had them arrested, stole their goods, then “resumed the game in high spirits, boasting that his luck had never been better.”

Thomas Jefferson never wrote or said, “I’m a great believer in luck. The harder I work the more I seem to have.” The quip was crafted by San Francisco humorist Coleman Cox for a 1922 collection titled Listen to This.

On Friday, January 13, 1882, thirteen men met in New York City as the Thirteen Club; they walked under a ladder, ate lobster salad sculpted into the shape of a coffin, and sat beneath a banner reading morituri te salutamus (“we who are about to die salute you”). The following year, the club’s newsletter gleefully reported that “not a single member is dead.”