Whether the intellectual habit, art, is a virtue?

Objections

Objection 1 : It would seem that art is not an intellectual virtue. For Augustine says (De Lib. Arb. ii, 18,19) that "no one makes bad use of virtue." But one may make bad use of art: for a craftsman can work badly according to the knowledge of his art. Therefore art is not a virtue.
Objection 2 : Further, there is no virtue of a virtue. But "there is a virtue of art," according to the Philosopher (Ethic. vi, 5). Therefore art is not a virtue.
Objection 3 : Further, the liberal arts excel the mechanical arts. But just as the mechanical arts are practical, so the liberal arts are speculative. Therefore, if art were an intellectual virtue, it would have to be reckoned among the speculative virtues.