The most important property of a program is whether it accomplishes the intention of its user.

The advancement of mathematics is through the continuous questioning of established truths.

The longer you look at an object, the more abstract it becomes, and, ironically, the more real.

大海不拒绝各种各样的水，所以才能成就它的博大；大山不拒绝形形色色的土石，所以才能成就它的高峻；贤明的君主不嫌弃百姓，所以能够聚集众多的臣民；读书人不厌倦学习，所以能达到圣贤的境界。