老子说：“你要谨慎，别去扰乱人心。人心受压抑就会颓丧，受推崇就会振奋，但无论颓丧还是振奋，都像是被囚禁和伤害一样，轻轻抚慰才能软化刚强。受到伤害时就像被切割雕刻，情绪激烈时热得像烈土，情绪低落时寒得像凝冰。它变化迅疾，俯仰之间就可再次遨游四海之外；它静处时像深渊一般宁静，活动时高悬于天一般腾跃；奋发矜骄，不可束缚，这恐怕只有人心吧！

最成功的公司是那些能够适应变化同时忠于核心价值观的公司。

Science is not just about theory; it's about making things that work in the real world.

The best programs are written so that computing machines can perform them quickly and so that human beings can understand them clearly. A programmer is ideally an essayist who works with traditional aesthetic and literary forms as well as mathematical concepts, to communicate the way that an algorithm works and to convince a reader that the results will be correct.