Courage is not hardwired—you can build it like a muscle. Here’s how

On February 10, 1985, an imprisoned 66-year-old male serving a life sentence was offered a conditional release that would have reunited him with his wife and children, from whom he had been separated for 23 years. The prisoner turned down the offer. His name was Nelson Mandela. In a rejection publicly delivered to the South African government by his daughter at a rally in Soweto, Mandela refused the condition that he permanently walk away from the country’s anti-apartheid movement. “I cher...