Algebra is the intellectual instrument which has been created for rendering clear the quantitative aspects of the world.
代数是人类创造的一种智力工具，用于清晰地表达世界的数量关系。
表演的挑战不是展示，而是揭示。
The best way to lead is by example.
艺术中没有错误，只有意外的发现。