One of the benefits of attending the Berkshire Hathaway (NYSE:BRK-B) shareholders' meeting is learning from the great value investors and Buffettologists who also make the yearly trek to Omaha. In this multipart series, Fool analyst Rex Moore speaks with Lawrence Cunningham, author of The Essays of Warren Buffett: Lessons for Corporate America. The book offers a unique approach by arranging all of Buffett's shareholder letters thematically, rather than chronologically.

Today, Professor Cunningham explains why all of the Berkshire companies fit together so well, despite their vast differences.

Rex Moore owns shares of Berkshire Hathaway. The Motley Fool recommends Berkshire Hathaway. The Motley Fool owns shares of Berkshire Hathaway and General Electric. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.