It is certain, to begin with, that the narrowest trade or professional training does something more for a man than to make a skilful practical tool of him — it makes him also a judge of other men's skill.

首先，可以肯定的是，最狭窄的行业或专业培训对一个人的作用比使他成为一个熟练的实用工具更重要——它也使他成为其他人技能的判断者。