1. We underestimate our own brainpower. 2. We overestimate the other fellow’s brainpower. Because of these errors many people sell themselves short. They fail to tackle challenging situations because it “takes a brain.” But along comes the fellow who isn’t concerned about intelligence, and he gets the job. What really matters is not how much intelligence you have but how you use what you do have. The thinking that guides your intelligence is much more important than the quantity of your brainpower. Let me repeat, for this is vitally important: the thinking that guides your intelligence is much
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