The ultimate test of any economic theory is whether it improves real-world decisions.
The body is not a thing, it is a situation: it is our grasp on the world and our sketch of our project.
The beauty of the universe lies in its complexity and the simplicity of the laws that govern it.
Customer needs always come first; everything else is secondary.
电的定律如此简单，可以用几行字表达，却又如此多样，其后果永远无法穷尽。
The most powerful weapon on earth is the human soul on fire.