cannot get rid, and of which the satisfaction is a benefit to us? And they are rightly called so, because we are framed by nature to desire both what is beneficial and what is necessary, and cannot help it.

True.

We are not wrong therefore in calling them necessary?

We are not.

And the desires of which a man may get rid, if he takes pains from his youth upwards — of which the presence, moreover, does no good, and in some cases the reverse of good — shall we not be right in saying that all these are unnecessary?

Yes, certainly.

Suppose we select an example of either kind, in order that we may have a general notion of them?