There is a total of 40594 clues beginning with so
- Source of the line "They shall beat their swords into plowshares"
- Source of the line "Thy money perish with thee"
- Source of the line "What's done is done"
- Source of the line "What's past is prologue," with "The"
- Source of the long word made from the starts of eight Across answers in this puzzle
- Source of the maxim "Four legs good, two legs bad"
- Source of the Mekong River
- Source of the milk for chèvre cheese
- Source of the milk for pecorino cheese
- Source of the milk for pecorino Romano cheese
- Source of the milk for Romano cheese
- Source of the Mississippi
- Source of the Mississippi
- Source of the mondegreen "Sunday monkey won't play piano song"
- Source of the most widely used metal
- Source of the music for a 2001 theatrical hit
- Source of the names of two months
- Source of the Niagara
- Source of the Niagara River
- Source of the Nile
- Source of the nuts in most biscotti
- Source of the one-liner
- Source of the outbursts (and hit comedy of 1993)
- Source of the Owl Creek?
- Source of the Phoenix' rebirth
- Source of the phrase "brave new world," with "The"
- Source of the phrase "pomp and circumstance"
- Source of the phrases "cakes and ale" and "milk of human kindness": Abbr
- Source of the pink in pickled turnips
- Source of the quip
- Source of the quip?
- Source of the quotation
- Source of the quote
- Source of the quote "Change is certain"
- Source of the quote "For the word of God is quick"
- Source of the quote in 6-Across
- Source of the quote, with "The"
- Source of the quote: "In fact, he rejected man and made the robot"
- Source of the Rhodes Scholarship endowment
- Source of the robe material for Incan royalty
- Source of the Rockefeller fortune
- Source of the Romance languages
- Source of the saying "Brevity is the soul of wit"
- Source of the saying "It is more blessed to give than to receive"
- Source of the saying "The gods help them that help themselves"
- Source of the six longest Across answers in this puzzle
- Source of the slogan
- Source of the song "Kids"
- Source of the starred neologisms
- Source of the stepquote, with "The"
- Source of the theme clues and answers
- Source of the Tigris and Euphrates, per Genesis
- Source of the title "Tender Is the Night"
- Source of the title material in "Weird Al" Yankovic's "The White Stuff"
- Source of the titles in this puzzle's theme
- Source of the Trojan horse story
- Source of the Truckee River
- Source of the Truckee
- Source of the victory wreath that crowned ancient Olympians
- Source of the wage-price freeze
- Source of the word "admiral"
- Source of the word "alcohol"
- Source of the word "algebra"
- Source of the word "avatar"
- Source of the word "bandanna"
- Source of the word "clan"
- Source of the word "galore"
- Source of the word "geyser"
- Source of the word "karma"
- Source of the word "khaki"
- Source of the word "kiwi"
- Source of the word "mantra"
- Source of the word "robot"
- Source of the word "robot"
- Source of the word "saga"
- Source of the word "trousers"
- Source of the word "whiskey"
- Source of the words "mamba" and "chimpanzee"
- Source of the words "mulligatawny" and "catamaran"
- Source of the words "O, beware, my lord, of jealousy; / It is the green-ey'd monster "
- Source of the words "pajama" and "spinach"
- Source of the words "zenith" and "nadir"
- Source of the words “plaid” and “trousers”
- Source of theatrical fog
- Source of this puzzle's quip
- Source of this puzzle's quotes
- Source of this puzzle's songs
- Source of this puzzle's theme
- Source of this puzzle's theme answers
- Source of thorns
- Source of Tiber and Arno Rivers
- Source of ticking
- Source of timber and shade
- Source of tin's chemical symbol
- Source of tofu
- Source of Tokay
- Source of tomatoes for homemade sauce
- Source of tomorrow's lunch, perhaps
- Source of Toothflix DVDs
- Source of toro