Warren Buffett studied business under Benjamin Graham at Columbia University. Graham is widely recognized as the father of value investing -- a strategy that focuses on finding stocks that trade below their intrinsic value -- and his teachings had a profound impact on Buffett. Buffett offered the following advice in his 1989 letter to Berkshire Hathaway shareholders: "It's far better to buy a wonderful company at a fair price than a fair company at a wonderful price."