I could hardly wait. But I also recalled the words of one of my heroes, Tom Hornbein, a renowned physician and climber on the first American team to summit Mount Everest, in 1963, back when it was still wild and remote. His book, Everest, The West Ridge, provided me with endless inspiration. “Maybe we can view risk like we would a drug, beneficial to the organism in the proper dose,” he once wrote. “Too much or too little may be harmful.”

