"The whole of mankind has a right to the benefit of the best ideas, which can only be produced by freedom of thought."

"The only way in which a human being can make some approach to knowing the whole of a subject, is by hearing what can be said about it by persons of every variety of opinion, and studying all modes in …"

"The peculiar evil of silencing the expression of an opinion is, that it is robbing the human race; posterity as well as the existing generation; those who dissent from the opinion, still more than tho…"

"The liberty of the individual must be thus far limited; he must not make himself a nuisance to other people."

"Even despotism does not produce its worst effects, so long as individuality exists under it; and whatever crushes individuality is despotism, by whatever name it may be called, and whether it professe…"