Everything must be free to be written and published without restraint.

Since the general or prevailing opinion on any subject is rarely or never the whole truth, it is only by the collision of adverse opinion that the remainder of the truth has any chance of being supplied.

The great creative individual . . . is capable of more wisdom and virtue than collective man ever can be.

When a thing is bought not for its use but for its costliness, cheapness is no recommendation. As Sismondi remarks, the consequence of cheapening articles of vanity, is not that less is expended on such things, but that the buyers substitute for the cheapened article some other which is more costly, or a more elaborate quality of the same thing; and as the inferior quality answered the purpose of vanity equally well when it was equally expensive, a tax on the article is really paid by nobody: it is a creation of public revenue by which nobody loses.

... All ideas need to be heard, because each idea contains one aspect of the truth. By examining that aspect, we add to our own idea of the truth. Even ideas that have no truth in them whatsoever are useful because by disproving them, we add support to our own ideas.

No longer enslaved or made dependent by force of law, the great majority are so by force of property; they are still chained to a place, to an occupation, and to conformity with the will of an employer, and debarred by the accident of birth to both the enjoyments, and from the mental and moral advantages, which others inherit without exertion and independently of desert. That this is an evil equal to almost any of those against which mankind have hitherto struggles, the poor are not wrong in believing.

In all intellectual debates, both sides tend to be correct in what they affirm, and wrong in what they deny.