David Gardner is the co-founder of The Motley Fool, and he’s one of the best stock market investors I know. There’s a fascinating short story involving David that can be found in a 2016 Fool.com article written by Morgan Housel titled Two Short Stories to Put Successful Investing Into Context. In the article, Morgan shared a conversation he had with David. Once, Morgan spotted David playing video games at the Fool’s office and asked him in jest: “If you had to give up board games, video games, or stocks, which would you quit?” (For context, David is a huge fan of board games.) David’s response surprised Morgan: He would choose to quit stocks rather than board games or video games. Here’s Morgan recounting David’s brilliant explanation in Two Short Stories to Put Successful Investing Into Context: “Games are hands-on by design. They are meant to be played, not left...