人的欲望和其他激情，本质上是受到他自己控制的；他真正的困难在于，要知道何时需要加以控制，何时不需要。
The desires， and other passions of man， in themselves， are in his own power； his real difficulties are， to know when they are to be controlled， and when not.
计算复杂性的美在于它能够揭示问题的固有难度，而不管用于解决这些问题的具体算法是什么。
"A good book is a magic gateway into a wider world of wonder, of joy, of meaning."
The greatest tragedy in mankind's entire history may be the hijacking of morality by religion.
品质是企业的生命线，没有品质就没有未来。