For Aristotle, every form of professionalism means a loss of caste. A feudal gentleman, he insists5, must never take too much interest in ‘any occupation, art or science … There are also some liberal arts, that is to say, arts which a gentleman may acquire, but always only to a certain degree. For if he takes too much interest in them, then these evil effects will follow’, namely, he will become proficient, like a professional, and lose caste.