在数学中，提出问题的艺术必须比解决问题更有价值。
In mathematics, the art of proposing a question must be held of higher value than solving it.
The concept of reducibility is central to understanding the relationships between different computational problems.
Simplicity is a great virtue but it requires hard work to achieve it and education to appreciate it. Simplicity is the ultimate sophistication.
要给儿童提供一个使他们得到满足的环境，必须努力了解儿童的需要。
The work of art is a trace of the invisible.
The best solutions often come from listening—to the ocean, to the fish, and to the communities that depend on them.
La literatura es el espejo de la sociedad, pero también su crítica.