The Role of Emotional Discipline
Graham highlights the critical role of emotional discipline in successful investing. He argues that intelligence in investing is more about character than brainpower. This involves being patient, disciplined, and able to control one's emotions. He illustrates this with historical examples, such as Sir Isaac Newton's failure to maintain emotional discipline during the South Sea Bubble, leading to significant financial losses. Graham asserts, 'The investor's chief problem—and even his worst enemy—is likely to be himself.'