Complete liberty of contradicting and disproving our opinion, is the very condition which justifies us in assuming its truth for purposes of action.

To mistake money for wealth, is the same sort of error as to mistake the highway which may be the easiest way of getting to your house or lands, for the house and lands themselves.

if any opinion is compelled to silence, that opinion may, for aught we can certainly know, be true. To deny this is to assume our own infallibility.

To say that secular means irreligious implies that all the arts and sciences are irreligious, and is very like saying that all professions except that of the law are illegal.

The great majority of those who speak of perfectibility as a dream, do so because they feel that it is one which would afford them no pleasure if it were realized.

We have a right, also, in various ways, to act upon our unfavorable opinion of anyone, not to the oppression of his individuality, but in the exercise of ours.

The demand for commodities is not the demand for labor.