Never invest in any idea you can't illustrate with a crayon.
世界上最伟大的事情是知道如何属于自己。
The Moving Finger writes; and, having writ, Moves on: nor all thy Piety nor Wit Shall lure it back to cancel half a Line, Nor all thy Tears wash out a Word of it.
Mathematics is the language with which God has written the universe.