错误同真理的关系，就象睡梦同清醒的关系一样。一个人从错误中醒来，就会以新的力量走向真理。

The greatest crimes are not committed by those who break the rules, but by those who follow them to the letter.

理解就是知道什么导致什么。

The most effective debugging tool is still careful thought, coupled with judiciously placed print statements.

The motor of our ingenuity is the question ‘Does it have to be like this?’, from which arise political reforms, scientific developments, improved relationships, better books.

事情在完成之前总是看起来不可能。