‘The thing which most distinguishes the amateur from the professional in financial operations is, simply, self-awareness. The secret of the professional, I'm now convinced, is the discovery that they can dramatically increase their chances of success by watching themselves even more carefully than they watch the market. The thing about the pros is not so much the specific knowledge of investment opportunities they have, but the fact that they know enough about themselves to protect themselves from themselves’ -Arthur Zeikel, November 1975.