| 100% | MOSTROCK | 8 | Start of a quote by 102-Across |
| 82% | IREALLYDIDNTSAY | 15 | Start of a quote by 39-Across |
| 82% | POETRY | 6 | Start of a quote by 50-Across |
| 82% | LANGUAGEISACITYTO | 17 | Start of a quote by 59-Across |
| 82% | ADVERTISINGIS | 13 | Start of a quote by 115-Across |
| 82% | FORGIVEYOUR | 11 | Start of a quote by 56-Across |
| 80% | YOUCAMPAIGNIN | 13 | Start of a quote by 1-/73-Across |
| 76% | ITHINKHAILTO | 12 | Start of a quote by 53-Across, when asked to name his favorite song |
| 75% | IFATFIRST | 9 | Start of a quote about creativity by 58-Across/39-Down |
| 74% | THETROUBLEWITH | 14 | Start of a quote by Lily Tomlin |
| 74% | CONVENTIONALITY | 15 | Start of a quote by 9-Down |
| 74% | ANYIDIOTCANFACE | 15 | Start of a quote by Anton Chekhov |
| 74% | LIFEISWHAT | 10 | Start of a quote by John Lennon |
| 74% | NOTHINGISOFTENA | 15 | Start of a quote by Will Durant |
| 74% | NOTHINGISSO | 11 | Start of a quote by John Kenneth Galbraith |
| 74% | YOUCANTHOLD | 11 | Start of a quote by Booker T. Washington |
| 74% | CAPITALISM | 10 | Start of a quote by economist Allan Meltzer |
| 73% | WHENYOUHITA | 11 | Start of a quote by jazz legend Miles Davis |
| 73% | WORKISTHERUINOF | 15 | Start of a quote by 26- and 32-Down |
| 72% | THETIMEYOUENJOY | 15 | Start of a quote by Bertrand Russell relevant to crossword solvers |
| 71% | IFNOMINATED | 11 | Start of a quote by Rep. Mo Udall, 1990, regarding the Presidency |
| 70% | AGOODNAME | 9 | Start of a quote by Lord Jeffery, 18th-century literary critic and judge |
| 69% | THE | 3 | Start of a quote on obstinacy by James Russell Lowell |
| 68% | THEONLYWAYTOGETRID | 18 | Start of a quote by this puzzle's honoree, whose 120th birthday is August 13, 2019 |
| 66% | ALLFORONE | 9 | Start of a quote from 20-Across |
| 66% | IJUSTPUTMYFEET | 14 | Start of a 58 Across/25 Down quote, describing his craft |
| 65% | WHADDYASUPPOSED | 15 | Start of a 35/36 Across quote, after seeing a Murphy bed |
| 64% | TOOMUCHOF | 9 | Start of a thought by 29-Across |
| 64% | WERELIVINGINAN | 14 | Start of a quip by 67-Across |
| 64% | ISIGNEDWITHTHEMILWAUKEE | 23 | Start of a quip by 58-Across |