Peter Lynch managed the Fidelity Magellan Fund from 1977 to 1990.

An average annual return of 29.2%.
Outperformed the S&P 500 index in eleven out of thirteen years.
Turned $1,000 into $28,000.
The best track record among mutual fund managers.
Perhaps the best of all time.
He retired at age 46.
Because his daughters were growing up, and he was missing it all.
He later said he didn't know anyone who would want to wish they had spent more time in the office before they died.
Could have managed funds for another 30 years.
But chose family instead.
The undervalued lesson of knowing when to stop.