One of his best rules, arguably his No. 1 for success, may move you farther and faster in life than ever before. But I warn you: It will take some internal work. Because it comes from deep down–from within us all. It’s a rule founded on a very squishy four-letter word that the business world often turns a blind eye to: Love.

Thanksgiving week Warren Buffett surprised investors with a shareholder letter that had more of a personal tone and a message of philanthropy and being thankful.