The only limit to our realization of tomorrow will be our doubts of today.
实现明天的唯一限制将是我们今天的疑虑。
理论计算机科学中的挑战不仅仅是解决问题,而是理解为什么它们难以解决。
The whites came to this land for a fresh start and to escape the tyranny of their masters, just as the freemen had fled theirs. But the ideals they held up for themselves, they denied others.