赏析：指出灵巧的人和聪明的人往往会因为自己的才能而劳累和忧虑，而没有才能的人则没有太多的追求和烦恼。

NP-completeness is not just a theoretical curiosity; it has profound implications for practical computing.

The future is not a result of choices among alternative paths offered by the present, but a place that is created—created first in the mind and will, created next in activity.

真相很少是纯粹的，也从不简单。