Book 2
1
These things having been settled, let us say whether goodness makes the purposive choice correct and the End right in the sense of making the agent choose for the sake of the proper End, or whether (as some hold) it makes the rational principle right. But what does this is self-control—for that saves the rational principle from being corrupted; and goodness and self-control are different.
2
But we must speak about this later, since all who do hold that goodness makes the rational principle right think so on the ground that that is the nature of self-control and self-control is a praiseworthy thing.
3
Having raised this preliminary question let us continue.It is possible to have one’s aim right but to be entirely wrong in one’s means to the end aimed at; and it is possible for the aim to have been wrongly chosen but the means conducing to it to be right; and for neither to be right.
4
But does goodness decide the aimOr, altering the text, makes the aim right. or the means to it? Well, our position is that it decides the aim, because this is not a matter of logical inference or rational principle, but in fact this must be assumed as a starting-point. For a doctor does not consider whether his patient ought to be healthy or not, but whether he ought to take walking exercise or not, and the gymnastic trainer does not consider whether his pupil ought to be in good condition or not, but whether he ought to go in for wrestling or not;
5
and similarly no other science either deliberates about its End. For as in the theoretic sciences the assumptions are first principles, so in the productive sciences the End is a starting-point and assumption: since it is required that so-and-so is to be in good health, if that is to be secured it is necessary for such-and-such a thing to be provided—just as in mathematics, if the angles of a triangle are together equal to two right angles, such and such a consequence necessarily follows.
