If we were to say that the loves and pleasures of this third part were concerned with gain, we should then be able to fall back on a single notion; and might truly and intelligibly describe this part of the soul as loving gain or money.
I agree with you.
Again, is not the passionate element wholly set on ruling and conquering and getting fame?
True.
Suppose we call it the contentious or ambitious—would the term be suitable?
Extremely suitable.
On the other hand, every one sees that the principle of knowledge is wholly directed to the truth, and cares less than either of the others for gain or fame.
Far less.
'Lover of wisdom,' 'lover of knowledge,' are titles which we may fitly apply to that part of the soul?
Certainly.