These qualifications are both moral and intellectual.

They require that no one shall be admitted to the ranks of thoroughly competent performers until he is morally and intellectually, as well as scientifically and manually, equipped for excellent work, and these appropriate moral and intellectual standards should be applied as incorruptibly as those born of specific technical practices.
A craftsman whose merits do not go beyond technical facility is probably deficient in both the intellectual and moral qualities essential to good work.

The rule cannot be rigorously applied, because the boundaries between high technical proficiency and some very special examples of genuine mastery are often very indistinct.

Still, the majority of craftsmen who are nothing more than, manually dexterous are rarely either sincere or disinterested in their personal attitude towards their occupation.

They have not made themselves the sort of moral instrument which is capable of eminent achievement, and whenever unmistakable examples of such a lack of sincerity and conviction are distinguished, they should in the interest of a complete standard of special excellence meet with the same reprobation as would manual incompetence.