‘It is therefore not difficult to see that the young must be taught those useful arts that are indispensably necessary; but it is clear that they should not be taught all the useful arts, those pursuits that are liberal being kept distinct from those that are illiberal, and that they must participate in such among the useful arts as will not render the person who participates in the vulgar. A task and also an art or a science must be deemed vulgar if it renders the body or sour or mind of free men useless for the employments and actions of virtue. Hence we entitle vulgar all such arts as deteriorate the condition of the body, and also the industries that earn wages; for they make the mind preoccupied and degraded. And even with the liberal sciences, although it is not illiberal to take part in some of them up to a point, to devote oneself to them too assiduously and carefully is liable to have the injurious results specified. Also it makes much difference what object one has in view in a pursuit or study; if one follows it for the sake of oneself or one’s friends, or on moral grounds, it is not illiberal, but the man who follows the same pursuit because of other people would often appear to be acting in a menial and servile manner‘

Aristotle politics