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.

The laws of nature are unforgiving.

成功不是幸福的关键。幸福是成功的关键。如果你热爱你所做的事情，你就会成功。