Depths of personal commitment allowed the great leaders to execute well in all aspects of their business, as well as to overcome any barriers and adversities they encountered.

Sam Walton, the founder of Walmart, noted, “I think I overcame every single one of my personal shortcomings by the sheer passion I brought to my work. I don’t know if you’re born with this kind of passion, or if you can learn it. But I do know you need it. If you love your work, you will be out there every day trying to do it the best you possibly can, and pretty soon everybody around you will catch the passion from you—like a fever.”

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