个人的不是私人的；它是政治的。

教学应始终适应学生的发展阶段。

子游问孝，孔子说：“现在的孝顺，只是能赡养老人。即使是犬马，都会得到饲养。不敬重，有何区别？”

最重要的思想是那些让我们以新的、更高效的方式利用现有资源的想法。

理论与观测之间的相互作用推动了天体物理学的发展。

意识是进化成功的工坊。

Every challenge is an opportunity to learn and grow.

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.

我们想什么，就会成为什么。