诗歌必须始终具有道德目的;它应该在愉悦的同时教导。
Poetry must always have a moral purpose; it should instruct while it delights.
因此,国家并非自古以来就存在。曾经有一些社会没有国家,对国家或国家权力毫无概念。在一定的经济发展阶段,这必然与社会分裂成阶级有关,国家变成了一种必要性。
Science should serve humanity, not the other way around.
Perspective is worth 80 IQ points.
Each new situation requires a new architecture.
The most important thing in science is not so much to obtain new facts as to discover new ways of thinking about them.