数学不是关于数字、方程、计算或算法的：它是关于理解的。
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
《在陆军军官学校开学典礼的演说》（1924年6月16日）
The absence of alternatives clears the mind marvelously.
那些让和平革命成为不可能的人将使得暴力革命不可避免。
Sustainability is not an option; it's a necessity for the future of our industry.
The best architecture is that which disappears, leaving only the experience.