本文認為，亞里斯多德理論哲學中所討論的目的和道德實 踐中的實踐性目的是不同的，前者具有精確性，而後者沒有；與這一 問題相關，本文還指出努斯也有理論努斯與實踐努斯之分，並連繫 《論靈魂》對欲求的討論，指出欲求有理性欲求即希望，和非理性欲 求即激情和欲望之分，從而在實踐領域中，希望和實踐努斯共同決定 了道德實踐的目的。

In this paper, I think the cognitive ends in Aristotle,s theoretical philosophy and the practical ends in his moral practices are different, the former is precise and the latter not. Nous can be divided into theoretical nous and practical nous. In On the So-ul, Aristotle divided the desire into the wish, which comes to be in the rational faculty, and the appetite and spirit, which come to be in the irrational part. I think, wish, that is to say, the rational desire and the practical nous decide the ends of the moral practices.