It is our choice, Harry, that show what we…
It is our choice, Harry, that show what we truly are, for more than our abilities. JK Rowling . Useful rules of thumb; bet size is A function of individual risk attitudes, but should be made consistently across bets with differing attractiveness. Bet size should be proportional to expected gain. Bet size should be inversely proportional to the square of the risk, if risk halves, bet size should quadruple.
— from The Flight Plan (Purpose/Wisdom/Risk) · Missing Billionaires by Victor Haghani and James White
In the book
Where the cost of failing is low and recoverable, take the leap freely. And remember that, as Harry Potter's headmaster told him, it is our choices, far more than our abilities, that show what we truly are. The largest risk of all is one we rarely even name as risk: to love. — The Flight Plan (Purpose/Wisdom/Risk)