John Stuart Mill, On Liberty

"If there are any persons who contest a received opinion,or who will do so if law or opinion will let them, let us thankthem for it, open our minds to listen to them, and rejoicethat there is some one to do for us what we otherwise ought,if we have any regard for either the certainty or the vitality ofour convictions, to do with much greater labor for ourselves."

"Both teachers and learners go to sleep at their post as soon as there is no enemy in the field."

"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."

"They are not insincere when they say that they believe these things. They do believe them, as people believe what they have always heard lauded and never discussed. But in the sense of that living belief which regulates conduct, they believe these doctrines just up to the point to which it is usual to act upon them."

"But these few are the salt of the earth; without them, human life would become a stagnant pool. Not only is it they who introduce good things which did not before exist, it is they who keep the life in those which already existed."

"[T]he source of everything respectable in man either as an intellectual or as a moral being namely, that his errors are corrigible."

"All that has been said of the importance of individuality of character, and diversity in opinions andmodes of conduct, involves, as of the same unspeakable importance, diversity of education. A general State education is a mere contrivance for moulding people to be exactly like one another: and as the mould in which it casts them is that which pleases the predominant power in the government, whether this be a monarch, a priesthood, an aristocracy, or the majority of the existing generation; in proportion as it is efficient and successful, it establishes a despotism over the mind, leading by natural tendency to one over the body. An education established andcontrolled by the State should only exist, if it exist at all, as one amongmany competing experiments, carried on for the purpose of example and stimulus, to keep the others up to a certain standard of excellence."

"Whoever fails in the consideration generally due to the interests and feelings of others, not being compelled by some more imperative duty, or justified by allowable self-preference, is a subject of moral disapprobation for that failure, but not for the cause of it, nor for the errors, merely personal to himself, which may have remotely led to it. In like manner, when a person disables himself, by conduct purely self-regarding, from the performance of some definite duty incumbent on him to the public, he is guilty of a social offence. No person ought to be punished simply for being drunk; but a soldier or a policeman should be punished for being drunk on duty."

"The greater part of the world has, properly speaking, no history, because the despotism of Custom is complete. This is the case over the whole East. Custom is there, in all things, the final appeal; justice and right mean conformity to custom; the argument of custom no one, unless some tyrant intoxicated with power, thinks of resisting. And we see the result. Those nations must once have had originality; they did not start out of the ground populous, lettered, and versed in many of the arts of life; they made themselves all this, and were then the greatest and most powerful nations in the world. What are they now? The subjects or dependants of tribes whose forefathers wandered in the forests when theirs had magnificent palaces and gorgeous temples, but over whom custom exercised only a divided rule with liberty and progress."

"How will the remaining portion of the community like to have the amusements that shall be permitted to them regulated by the religious and moral sentiments of the stricter Calvinists and Methodists? Would they not, with considerable peremptoriness, desire these intrusively pious members of society to mind their own business? This is precisely what should be said to every government and every public, who have the pretension that no person shall enjoy any pleasure which they think wrong."

"We can never be sure that the opinion we are endeavouring to stifle is a false opinion; and if we were sure, stifling it would be an evil still."

"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 professes to be enforcing the will of God or the injunctions of men."

"The beliefs which we have the most warrant for have no safeguard, but a standing invitation to the whole world to prove them unfounded."

"He who lets the world, or his own portion of it, choose his plan of life for him, has no need of any other faculty than the ape-like one of imitation. He who chooses his plan for himself, employs all his faculties."

"The assumption that we are infallible can we justify the suppression of opinions we think false. Ages are as fallible as individuals, every age having held many opinions which subsequent ages have deemed not only false but absurd."

"Despotism is a legitimate mode of government in dealing with barbarians, provided the end be their improvement."

"First, 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. Secondly, though the silenced opinion be an error, it may, and very commonly does, contain a portion of the truth; and since the general or prevailing opinion on any subject is rarely or never the whole truth, it is only by the collision of adverse opinions that the remainder of the truth has any chance of being supplied."

"No one can be a great thinker who does not recognize that as a thinker it is his first duty to follow his intellect to whatever conclusions it may lead."

"Christian morality (so called) has all the characters of a reaction; it is, in great part, a protest against Paganism. Its ideal is negative rather than positive; passive rather than action; innocence rather than Nobleness; Abstinence from Evil, rather than energetic Pursuit of Good: in its precepts (as has been well said) 'thou shalt not' predominates unduly over 'thou shalt."

"A person may cause evil to others not only by his actions but by his inaction, and in either case he is justly accountable to them for the injury."