The moment you stop trying to be better is the moment you start to get worse.

The human being is essentially self-determining; he becomes what he wills himself to be.

最好的领导者是那些最热衷于让比自己更聪明的人围绕在自己身边的人。

The stranger is close to us, insofar as we feel between him and ourselves common features of a national, social, occupational, or generally human, nature. He is far from us, insofar as these common features extend beyond him or us, and connect us only because they connect a great many people.

真正的进步发生在我们停止为过去优化，开始为未来建设之时。