"The thing is, nothing he taught me involved raw brainpower. The more I learned the more I realized that the bulk of his intelligence and his performance just came from study and practice, and that the had amassed a large artillery of intellectual and mathematical tools that he had learned and trained to call upon. He showed me some of those tools, but what I really ended up learning was how to go about finding, building, and refining my own set of cognitive tools. I admired R., and I looked up to him, and while I doubt I will ever compete with his genius, I recognize that it's because of a relative lack of my conviction and an excess of his, not some accident of genetics."

...

"have you learned how to study on your own in the absence of a teacher or curriculum? These are the most valuable tools you can acquire because they are the tools you will use to develop more powerful and more insightful tools."

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"And I put that in quotes because "smart" is really just a way of saying "has invested so much time and sweat that you make it look effortless." You feel like you are burnt out or that you are on the verge of burning out, but in reality you are on the verge of deciding whether or not you will burn out. It's scary to acknowledge that it's a decision because it puts the onus on you to to do something about it, but it's empowering because it means there is something you can do about it.  So do it."