Managing a growing business requires unyielding dedication that can consume the body, impair the senses and warp the mind. Such effects are harmful to the individual and the enterprise. Clinical objectivity is the only preventative.
Growth implies and entails risk. Risk begets failure as well as success. Wide perspective gained through nonbusiness experience or study helps one endure the pressures and accept the results, good and bad, of business decisions.
This video is a true classic on clear thinking: