Profound ignorance makes a man dogmatic. The man who knows nothing thinks he is teaching others what he has just learned himself; the man who knows a great deal can't imagine that what he is saying is not common knowledge, and speaks more indifferently.
A coxcomb is one whom simpletons believe to be a man of merit.
Discourtesy does not spring merely from one bad quality, but from several--from foolish vanity, from ignorance of what is due to others, from indolence, from stupidity, from distraction of thought, from contempt of others, from jealousy.
Incivility is not a Vice of the Soul, but the effect of several Vices; of Vanity, Ignorance of Duty, Laziness, Stupidity, Distraction, Contempt of others, and Jealousy.
A dogmatic tone is generally inspired by abysmal ignorance. The man who knows nothing thinks he is informing others of something which he has that moment learnt; the man who knows a great deal can scarcely believe that people are ignorant of what he is telling them, and speaks more diffidently.
