Each undervalues that part of the materials of thought with which he is not familiar.

Money is a machine for doing quickly and commodiously what would be done, though less quickly and commodiously, without it.

The peculiarity of the evidence of mathematical truths is that all the argument is on one side.

The cause, then, philosophically speaking, is the sum total of the conditions, positive and negative, taken together; the whole of the contingencies of every description, which being realized, the consequent invariably follows.

Education makes a man a more intelligent shoemaker, if that be his occupation, but not by teaching him how to make shoes; it does so by the mental exercise it gives, and the habits it impresses.

Marriage is the only actual bondage known to our law. There remain no legal slaves, except the mistress of every house.

Persons of genius, it is true, are, and are always likely to be, a small minority; but in order to have them, it is necessary to preserve the soil in which they grow.