The Republic by Plato
The Republic by Plato Because it has a particular quality which no other has?
Yes.
And it has this particular quality because it has an object of a particular kind; and this is true of the other arts and sciences?
Yes.
Now, then, if I have made myself clear, you will understand my original meaning in what I said about relatives. My meaning was, that if one term of a relation is taken alone, the other is taken alone; if one term is qualified, the other is also qualified. I do not mean to say that relatives may not be disparate, or that the science of health is healthy, or of disease necessarily diseased, or that the sciences of good and evil are therefore good and evil; but only that, when the term science is no longer used absolutely, but has a qualified object which in this case is the nature of health and disease, it becomes defined, and is hence called not merely science, but the science of medicine.
I quite understand, and I think as you do.
Would you not say that thirst is one of these essentially relative terms, having clearly a relation—
Yes, thirst is relative to drink.