📈 The 8th Wonder of the World

Money that earns money

Compound growth means your returns start earning returns of their own.

Year 1: your savings grow.
Year 2: your savings and last year’s growth grow.
Year 30: the growth dwarfs everything you put in.

Einstein allegedly called it the 8th wonder of the world. Whether he said it or not — the math is real.

Quick check: A penny that doubles every day for 30 days becomes…

1. About $50
2. About $10,000
3. Over $5,000,000 ✓

$5,368,709.12, to be exact. Humans think in straight lines; compounding is a curve. That’s why starting *early* matters more than starting *big*.

Try it: Try it yourself

Slide the numbers and watch the curve. Notice what changing the *time* does compared to changing the amount.

Slide the monthly amount, the years, and the growth rate — and watch the curve bend. Notice how time beats amount: the most powerful ingredient in compounding is starting early, not starting big. Open the Compound Growth tool →

Quick check: What is the most powerful ingredient in compounding?

1. A huge starting amount
2. Time ✓
3. Luck

Time. Someone who starts at 25 with small amounts usually beats someone who starts at 40 with big ones. The best day to start was yesterday; the second-best is today.

Stoic corner

"No great thing is created suddenly, any more than a bunch of grapes or a fig." — Epictetus

Compounding is patience made visible. Small, boring, consistent actions — repeated for years — are how every great fortune (and every great character) is built.