宪法约束是防止强者剥削弱者的规则。
迈向可持续实践的每一个小步骤都很重要；完美不是目标，进步才是。
文学是保持人类火焰不灭的一种方式。
Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.