Aristotle in the fifth book of his Metaphysics shows that the end is a cause for it represents an answer to the question: Because of what? which question calls for a cause.

• 这一问题询问一个原因，由于目的提供了第一位的答案，因此它是第一因，而其名副其实也一目了然，因为如果我们问：某物为何产生了一个结果？