The world is a book, and those who do not travel read only one page.
数学的美在于它是一种可以以其他任何方式都无法描述宇宙的语言。
Mental processes exist because they serve a purpose.
"Do not go where the path may lead, go instead where there is no path and leave a trail."
我知道无论我变得多么优秀,我总能进步。