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 only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

可持续发展不仅仅是一种趋势，更是我们对后代的责任。

科学与传统的合作可以释放农业的最大潜力。