And this is what the text says.
But here arises a doubtful question, which is not to be passed over without being put and answered.

Some calumniator of the Truth might be able to say that if, by increasing desire in their acquisition, riches are imperfect and therefore vile, for this reason science or knowledge is imperfect and vile, in the acquisition of which the desire steadily increases, wherefore Seneca says, "If I should have one foot in the grave, I should still wish to learn." But it is not true that knowledge is vile through imperfection.

By distinction of the consequences, increase of desire is not in knowledge the cause of vileness.

That it is perfect is evident, for the Philosopher, in the sixth book of the Ethics, says that science or knowledge is the perfect reason of certain things.

To this question one has to reply briefly; but in the first place it is to be seen whether in the acquisition of Knowledge the desire for it is enlarged in the way suggested by the question, and whether the argument be rational.