There are people extremely talented in specific sciences who are ignorant of the meaning of life. Such people can be very dangerous, because they may have great knowledge, without knowing to where it should be used. The third intellectual virtue is scientia, which perfects the mind in the apprehension of the various temporal realities. The fourth intellectual virtue is synderesis, the habit of the first principles of the practical reason, to pursue good and avoid evil. The next is art, the capacity of the appropriate execution of artistic projects.
Art covers the fine arts and politics, education, spiritual direction.
We assess the value of the art not by the moral quality of the artist, but by the product. Saint Thomas defines art as recta ratio factibilium. It is a virtue which perfects products. It is a product of the art, not of the person, which is why it's an intellectual virtue and not a moral virtue. We assess a dentist as a dentist, not whether he says the rosary every day.