Challenges are opportunities in disguise; embrace them with courage.
挑战是伪装的机会;以勇气拥抱它们。
Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.
数学中最深刻的思想往往来自最简单的问题。
He tore my heart, but you broke my life.