Whether there is only one moral virtue?

Objections

Objection 1 : It would seem that there is only one moral virtue. Because just as the direction of moral actions belongs to reason which is the subject of the intellectual virtues; so does their inclination belong to the appetite which is the subject of moral virtues. But there is only one intellectual virtue to direct all moral acts, viz. prudence. Therefore there is also but one moral virtue to give all moral acts their respective inclinations.
Objection 2 : Further, habits differ, not in respect of their material objects, but according to the formal aspect of their objects. Now the formal aspect of the good to which moral virtue is directed, is one thing, viz. the mean defined by reason. Therefore, seemingly, there is but one moral virtue.
Objection 3 : Further, things pertaining to morals are specified by their end, as stated above (Question [1], Article [3]). Now there is but one common end of all moral virtues, viz. happiness, while the proper and proximate ends are infinite in number. But the moral virtues themselves are not infinite in number. Therefore it seems that there is but one.