在我们这个发人深省的时代，最发人深省的是我们仍然没有在思考。
"The most thought-provoking thing in our thought-provoking time is that we are still not thinking."
The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.
It's not worth it to know you're not worth it!
亲眼目睹世道的变化趋向，才知道国家治乱的关键必定在于人心的向背和风俗的好坏。