Training, if it is to be effective, must have a goal toward which it aspires. There must be standards by which to judge whether the training has been effective. As numerous as the vocations are, they are detached from any moral significance. A doctor is not morally superior to the man who collects our garbage. The doctor may be superior to the trash man in terms of his buying power or the degree of envy to which he is subject by his fellow citizens because of it, but morally the two men are equal.
Training is thus morally neutral.
To be able to perform a task better than other people carries with it no moral implications. Education, as traditionally understood, is very different from training. It had as its goal man's perfection. Such a man is able to distinguish between the good and the bad, the true and the false, the just and the unjust. The occupations, or 'arts' as they were once called, all contain within themselves criteria for evaluation.