数学中的每一个问题都是学习新东西的机会。
Every problem in mathematics is an opportunity to learn something new.
"You can't change what you refuse to confront."
一个人真正的财富是他的记忆。除此之外,他既不富有也不贫穷。
快乐是生活的关键。没有快乐,你就一无所有。