The Liberal Arts are skills to be developed. These skills are the three arts having to do with thinking properly (the Trivium: Grammar, Logic and Rhetoric), and the four arts having to do with the things to think about (the Quadrivium: Arithmetic, Geometry, Astronomy and Music). All of the liberal arts, while retaining their classical form, are ordered toward Philosophy (love of wisdom), and ultimately toward Theology.
The Liberal Arts open the soul to the only reality that will ultimately satisfy–the Truth. As Saint Augustine said, our hearts are restless until they rest in Him. The intellect, or the mind is dissatisfied until it has found the Truth. Since God designed the intellect for truth, it is our responsibility to seek out and fulfill this need. Only then do we realize our true worth and purpose–to rest in God, to fix our minds upon the Truth.