The Wisdom Audit, part 8 of 9. This series tests famous sayings against published research and ends each test with a verdict.
Two sayings about time make an odd pair this week: one was coined by the most famous self-improvement writer in American history, and the other by anonymous French peasants eight centuries ago. The peasants score better.
Time is money
Origin: Benjamin Franklin wrote “remember that time is money” in Advice to a Young Tradesman in 1748. Even this one wasn’t original; the phrase had appeared in a London paper, The Free-Thinker, in 1719. Franklin’s genius was distribution.
What it actually claims: the saying has two readings, and they test out opposite. Reading one says time and money are exchangeable, so spend money to get time. Reading two says time should be valued like money, priced, metered, and billed.
Reading one holds. Whillans and colleagues, in PNAS in 2017, surveyed 6,271 adults across four countries and found that people who spent money on time-saving services such as cleaning, cooking, and errands reported higher life satisfaction, an effect that held across income levels. Then came the field experiment: sixty working adults got $40 on each of two weekends, once directed toward a time-saving purchase and once toward a material one. Reported mood was higher on the time-saving weekend, 4.00 versus 3.71 on the study’s scale. Buying time beat buying things, and most people, asked in advance, predict the opposite.
Reading two backfires, measurably. DeVoe and House showed in 2012 that simply prompting people to calculate their hourly wage before a leisure task reduced the enjoyment they got from it, and the mechanism was impatience: pricing the hour made people unable to sit still inside it. Once time has a price, “free” time reads as forgone revenue, and you can’t relax inside an opportunity cost. DeVoe and Pfeffer found the pattern in the field: people paid by the hour were less likely to volunteer their time at all. Treating time as money doesn’t make you value time more. It makes you enjoy it less and guard it more.
Verdict: Split, and the split runs cleanly along the two readings. Trading money for time is supported. Accounting for time like money eats the asset.
The rewrite: Time is money when you’re buying it back. The moment you start billing it, it stops being yours.
Rome wasn’t built in a day
Origin: The saying comes from an anonymous French proverb collection, Li Proverbe au Vilain, around 1190: “Rome ne fut pas faite toute en un jour.” It entered English through Richard Taverner’s 1545 translation of Erasmus. The sentiment survived 800 years without a named author, which by this series’ standards is a green flag: nobody was selling anything.
What it actually claims: significant results take years, and apparent overnight successes are a measurement error.
Every dataset agrees. Simon and Chase, studying chess in 1973, found no case on record, including Bobby Fischer, of anyone reaching grandmaster level with less than about a decade of intense preoccupation with the game. Their estimate for a master ran to 10,000 to 50,000 hours of looking at chess positions. This is the finding that later mutated into the 10,000-hour rule; the honest version was always “about a decade.”
The founder data says the same thing. Azoulay, Jones, Kim, and Miranda, in the American Economic Review: Insights, analyzed 2.7 million company founders. Mean age at founding across new employer firms was 41.9, and the mean age of founders of the fastest-growing 0.1 percent of new firms was 45. The wunderkind founder is a media artifact; the typical high-growth founder has been compounding domain experience for two decades.
The company data agrees too. Jay Ritter’s IPO research at the University of Florida puts the median age of a US company at IPO at 11 years across 2001 to 2025, and 12 years for the 2025 cohort. When you finally hear about a company on listing day, it is typically deep into its second decade of existence. The “overnight” in overnight success is the night you first heard the name.
Verdict: Holds. This is one of the cleanest passes in the series.
The rewrite: Rome wasn’t built in a day. It was built in roughly 4,000 days, by people who mostly weren’t famous until day 3,000.
The shortest post in the series covers the longest timescales
Put the two verdicts together and you get a compact theory of time.
| Move | Data | Payoff |
|---|---|---|
| Spend money to reclaim hours | Whillans 2017 | Life satisfaction rises, across incomes |
| Stop metering your leisure | DeVoe & House 2012 | Enjoyment returns when the clock stops billing |
| Commit to decade-scale projects | Simon & Chase 1973, Azoulay 2020, Ritter 2025 | The tail outcomes live almost exclusively there |
There’s a quiet contradiction between this post and part 6. Practice explains only 12 percent of performance, yet everything here says mastery and outsized outcomes take a decade. Both are true, and the reconciliation matters: the decade is necessary, not sufficient. Time in is the entry fee, not the prize formula. The people who misread that spend ten years grinding joylessly, hourly rate in mind, at something the variance was never going to reward, which manages to violate every finding in this post at once.
The French peasants had it right, and they had it right anonymously, for free, in 1190. Franklin was half right, and the half he got wrong he sold very, very well.
Next in the series: the finale, with every verdict on one page and a protocol for auditing the next piece of advice you inherit.
Sources: Franklin, Advice to a Young Tradesman, 1748; The Free-Thinker, 1719; Whillans, Dunn, Smeets, Bekkers & Norton 2017 (PNAS 114); DeVoe & House 2012 (Journal of Experimental Social Psychology 48); DeVoe & Pfeffer 2007 (Academy of Management Journal 50); Simon & Chase 1973 (American Scientist 61); Azoulay, Jones, Kim & Miranda 2020 (AER: Insights 2); Ritter, “Median Age of IPOs Through 2025,” University of Florida.
