The natural effort of every individual to better his own condition， when suffered to exert itself with freedom and security， is so powerful a principle that it is alone， and without any assistance， not only capable of carrying on the society to wealth and prosperity but of surmounting a hundred impertinent obstructions with which the folly of human laws too often encumbers its operations.
You have to be willing to fail to create something original.
Cognitive processes are rule-governed transformations of symbolic structures.
不是因为某些事物难以发现，我们才不去寻找；而是因为我们不去寻找，它们才显得难以发现。
The only way to do great work is to love what you do.