办事,不能做尽;说话,不能说尽;势力,不能倚尽;幸福,不能享尽。
The preservation of the means of knowledge among the lowest ranks is of more importance to the public than all the property of all the rich men in the country.
Problem solving is the central activity of intelligent systems.
你无法改变你的来处,但你可以改变你的去向。