The beauty of mathematics lies in its simplicity and depth.
"The greatest happiness of life is the conviction that we are loved; loved for ourselves, or rather, loved in spite of ourselves."
没有什么能阻挡一个拥有正确心态的人实现目标;世界上没有什么能帮助一个心态错误的人。
"To understand the present, we must listen to the voices of the past."
我的语言的界限意味着我的世界的界限。