The most important property of a program is whether it accomplishes the intention of its user.
We die containing a richness of lovers and tribes, tastes we have swallowed, bodies we have plunged into and swum up as if rivers of wisdom, characters we have climbed into as if trees, fears we have hidden in as if caves.
The essence of mathematics is not just in solving problems but in asking the right questions.
不能通过正式手段从非正式到正式。
"Reading is the key to unlocking the world."
The consequences of an act affect the probability of its occurring again.