| 100% | WORKISTHERUINOF | 15 | Start of a quote by 26- and 32-Down |
| 65% | AGOODNAME | 9 | Start of a quote by Lord Jeffery, 18th-century literary critic and judge |
| 64% | CONVENTIONALITY | 15 | Start of a quote by 9-Down |
| 60% | MYOUTPUTISDOWNBUT | 17 | Start of a comment by 3- and 126-Down |
| 59% | IFATFIRST | 9 | Start of a quote about creativity by 58-Across/39-Down |
| 59% | IREALLYDIDNTSAY | 15 | Start of a quote by 39-Across |
| 59% | THETROUBLEWITH | 14 | Start of a quote by Lily Tomlin |
| 59% | POETRY | 6 | Start of a quote by 50-Across |
| 59% | LANGUAGEISACITYTO | 17 | Start of a quote by 59-Across |
| 59% | ANYIDIOTCANFACE | 15 | Start of a quote by Anton Chekhov |
| 59% | LIFEISWHAT | 10 | Start of a quote by John Lennon |
| 59% | MOSTROCK | 8 | Start of a quote by 102-Across |
| 59% | NOTHINGISOFTENA | 15 | Start of a quote by Will Durant |
| 59% | ADVERTISINGIS | 13 | Start of a quote by 115-Across |
| 59% | FORGIVEYOUR | 11 | Start of a quote by 56-Across |
| 58% | NOTHINGISSO | 11 | Start of a quote by John Kenneth Galbraith |
| 58% | YOUCANTHOLD | 11 | Start of a quote by Booker T. Washington |
| 58% | YOUCAMPAIGNIN | 13 | Start of a quote by 1-/73-Across |
| 58% | CAPITALISM | 10 | Start of a quote by economist Allan Meltzer |
| 58% | WHENYOUHITA | 11 | Start of a quote by jazz legend Miles Davis |
| 57% | THETIMEYOUENJOY | 15 | Start of a quote by Bertrand Russell relevant to crossword solvers |
| 56% | IFNOMINATED | 11 | Start of a quote by Rep. Mo Udall, 1990, regarding the Presidency |
| 55% | ITHINKHAILTO | 12 | Start of a quote by 53-Across, when asked to name his favorite song |
| 55% | THE | 3 | Start of a quote on obstinacy by James Russell Lowell |
| 54% | THEONLYWAYTOGETRID | 18 | Start of a quote by this puzzle's honoree, whose 120th birthday is August 13, 2019 |
| 52% | IJUSTPUTMYFEET | 14 | Start of a 58 Across/25 Down quote, describing his craft |
| 50% | GOODNEWSBADNEWS | 15 | Start of a mixed message, as illustrated by 17-, 23-, 39- and 54-Across |
| 50% | POOR | 4 | Start of a word ladder whose first and last words are suggested by 36-Across |
| 49% | AMEDIUMSOCALLED | 15 | Start of a definition of television, by 9-Down |
| 49% | ADOORSWHATADOG | 14 | Start of a quip by 52-Down |