有人自认为在做有用的事，却收效甚微；有人看似在做“无用”之功却流芳后世，引为大用。
Every magician has a different way of seeing the world, and that is what makes their magic unique.
证明的严谨性将数学与所有其他科学区分开来。
"Children's literature should be taken seriously because it shapes young minds."