“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 those who hold it. If the opinion is right, they are deprived of the opportunity of exchanging error for truth: if wrong, they lose, what is almost as great a benefit, the clearer perception and livelier impression of truth, produced by its collision with error.”

“Truth gains more even by the errors of one who, with due study and preparation, thinks for himself, than by the true opinions of those who only hold them because they do not suffer themselves to think…”

“Those who never retract their opinions love themselves more than they love truth.”

“We all know dogmatists who are more concerned about holding their opinions than about investigating their truth. ... if they are mistaken, they will never discover it; they have condemned themselves to perpetual error. Human beings (including myself) sometimes use their beliefs for wish-fulfillment. Too often we believe what we want to be true.”

“Truth always rests with the minority, and the minority is always stronger than the majority, because the minority is generally formed by those who really have an opinion, while the strength of a majority is illusory, formed by the gangs who have no opinion — and who, therefore, in the next instant (when it is evident that the minority is the stronger) assume its opinion… while truth again reverts to a new minority.”

“Among those who still have enough wisdom not to think fairy-stories are pernicious, the common opinion seems to be that there is a natural connection between the minds of children and fairy-stories, of the same order as the connection between children's bodies and milk. I think this is an error; at best an error of false sentiment, and one that is therefore most often made by those who, for whatever private reason (such as childlessness), tend to think of children as a special kind of creature, almost a different race, rather than normal, if immature, members of a particular family, and of the human family at large.”