You don’t really have a competency if you don’t know the edge of it.

Quote Author: , Nationality: , Sex: 

Profession(s) | Businessman | Investor | Philanthropist | 

Born: January 1, 1924

Charles Thomas Munger is an American investor, businessman and philanthropist. He is vice chairman of Berkshire Hathaway, the conglomerate controlled by Warren Buffett; Buffett has described Munger as his partner. Munger served as chairman of Wesco Financial Corporation from 1984 through 2011. He is also chairman of the Daily Journal Corporation, based in Los Angeles, California, and a director of Costco Wholesale Corporation. (Source + full bio: Wikipedia org)