The power of mathematics comes from its ability to abstract and generalize, turning specific problems into universal truths.
文章之所以不能断绝于天地之间,是因为它能够阐明道理,记录政事,体察民间疾苦,乐于称道他人的善行。
You have to believe in yourself when no one else does.
真相很少是纯粹的,也从不简单。