You cannot swim for new horizons until you have courage to lose sight of the shore.
原子能的释放并没有创造新的问题。它仅仅是把解决一个现有问题的工作变得更为急迫。
人类生活中痛苦和混乱的主要来源,似乎来自于高估了一种持久状况与另一种持久状况之间的差异。
The P versus NP problem is one of the most important unsolved problems in computer science.