The workings of an intellect at once untrained and self-sufficient are like the ways of Infinite Wisdom--past finding out.
Philosophy and politeness harmonize in the effort to meet such intellects upon what they shall not suspect is "made ground." To apply to them the rules of conversation and debate you would use in intercourse with equals would be absurd, and disagreeable alike to you and to themselves.

They would never forgive a plain statement of the difference between you and their guild.
As a matter of curious experiment, I made the attempt once, in a case of a handsome dolt, who was, nominally, a domestic in my employ for a few months.

She had an affected pose and tread which she conceived to be majestic.

She was stupid, awkward and slovenly about her work, and altogether so "impossible" that I disliked to send her adrift upon the world, and was still more averse to imposing her upon another household.

In a weak moment I essayed to reason her out of her fatuous vanity, and stimulate in her a desire to make something better of herself.