Being smart isn't good enough; you need to be able to finish what you've started. It's all about the execution and not the concept. Furthermore, he's found he

Being smart isn't good enough; you need to be able to finish what you've started. It's all about the execution and not the concept. Furthermore, he's found he prefers to select hard workers and promote them up than to pick smart, ambitious kids from good families or good credentials. Hard work is better than sheer brilliance.