By the 'mud-sill' theory it is assumed that labor and education are incompatible; and any practical combination of them impossible. According to that theory, a blind horse upon a tread-mill, is a perfect illustration of what a laborer should be -- all the better for being blind, that he could not tread out of place, or kick understandingly. According to that theory, the education of laborers, is not only useless, but pernicious, and dangerous. In fact, it is, in some sort, deemed a misfortune that laborers should have heads at all.
Abraham LincolnWe all declare for liberty; but in using the same word we do not all mean the same thing. With some the word liberty may mean for each man to do as he pleases with himself, and the product of his labor; while with others, the same word many mean for some men to do as they please with other men, and the product of other men's labor. Here are two, not only different, but incompatible things, called by the same name - liberty. And it follows that each of the things is, by the respective parties, called by two different and incompatible names - liberty and tyranny.
Abraham Lincoln