"The greatest challenge is to paint what cannot be painted."
The man who is anybody and who does anything is surely going to be criticized, vilified, and misunderstood.
The most important thing in mathematics is to understand the concepts, not just to memorize formulas.
几个世纪以来,印第安人发展了手语来传达人们感兴趣的现象。来自不同部落(FORTRAN,LISP,ALGOL,SNOBOL等)的程序员可以使用不需要他们在小马上扛黑板的程序员。
The state of nature has a law of nature to govern it, which obliges every one: and reason, which is that law, teaches all mankind, who will but consult it, that... no one ought to harm another in his life, health, liberty, or possessions.