Dichotomy of Control
The term "indifferent" has two meanings: in the first it denotes the things which do not contribute either to happiness or to misery, as wealth, fame, health, strength, and the like; for it is possible to be happy without having these, although, if they are used in a certain way, such use of them tends to happiness or misery.
In quite another sense those things are said to be indifferent which are without the power of stirring inclination or aversion; e.g. the fact that the number of hairs on one's head is odd or even or whether you hold out your finger straight or bent.But it was not in this sense that the things mentioned above were termed indifferent, they being quite capable of exciting inclination or aversion. Hence of these latter some are taken by preference, others are rejected, whereas indifference in the other sense affords no ground for either choosing or avoiding.