A personal finance formula where you never spend more than 70 cents of every dollar, allocating the remaining 30 cents as: 10 cents to charity, 10 cents to active capital (profit-seeking ventures), and 10 cents to passive capital (interest-bearing investments).
"Never spend more than 70 cents... 10 cents for charity... 10 cents. I call active capital... The third 10 cents is vitally important. I call it passive capital."