——1912年在旧金山丽蝉戏院的演说
Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding.
"To travel is to discover that everyone is wrong about other countries."
释义：权力决策必须冷酷，优柔寡断者不配掌权。
"Every story is a journey, and every journey changes the traveler."