永远不要停止质疑如何改进事物。
Never stop questioning how things can be improved.
看看那些星星，看它们如何为你闪耀。
Quality is not a fortune; it is a plan.
I know that I am intelligent，because I know that I know nothing.
Writing is a way of talking without being interrupted.
The real tragedy of the poor is that they can afford nothing but self-denial.