Book II Chapter 3

The effect which lectures produce on a hearer depends on his habits; for we demand the language we are accustomed to, and that which is different from this seems not in keeping but somewhat unintelligible¹ and foreign because of its unwontedness. For it is the customary that is intelligible². The force of habit is shown by the laws, in which the legendary³ and childish elements prevail over our knowledge about them, owing to habit. Thus some people do not listen to a speaker unless he speaks mathematically, others unless he gives instances, while others expect him to cite a poet as witness. And some want to have everything done accurately⁴, while others are annoyed by accuracy, either because they cannot follow the connexion of thought or because they regard it as pettifoggery. For accuracy has something of this character, so that as in trade so in argument some people think it mean. Hence one must be already trained to know how to take each sort of argument, since it is absurd to seek at the same time knowledge and the way of attaining⁵ knowledge; and it is not easy to get even one of the two.

The minute accuracy of mathematics is not to be demanded in all cases, but only in the case of things which have no matter. Hence method is not that of natural science; for presumably the whole of nature has matter. Hence we must inquire first what nature is: for thus we shall also see what natural science treats of (and whether it belongs to one science or to more to investigate the causes and the principles of things).

1 unintelligible   

adj.无法了解的，难解的，莫明其妙的

参考例句：

• If a computer is given unintelligible data, it returns unintelligible results.如果计算机得到的是难以理解的数据，它给出的也将是难以理解的结果。
• The terms were unintelligible to ordinary folk.这些术语一般人是不懂的。

2 intelligible   

adj.可理解的，明白易懂的，清楚的

参考例句：

• This report would be intelligible only to an expert in computing.只有计算机运算专家才能看懂这份报告。
• His argument was barely intelligible.他的论点不易理解。

3 legendary   

adj.传奇（中）的，闻名遐迩的；n.传奇（文学）

参考例句：

• Legendary stories are passed down from parents to children.传奇故事是由父母传给孩子们的。
• Odysseus was a legendary Greek hero.奥狄修斯是传说中的希腊英雄。

4 accurately   

adv.准确地，精确地

参考例句：

• It is hard to hit the ball accurately.准确地击中球很难。
• Now scientists can forecast the weather accurately.现在科学家们能准确地预报天气。

5 attaining   

（通常经过努力）实现( attain的现在分词 )； 达到； 获得； 达到（某年龄、水平、状况）

参考例句：

• Jim is halfway to attaining his pilot's licence. 吉姆就快要拿到飞行员执照了。
• By that time she was attaining to fifty. 那时她已快到五十岁了。