“New opinions are always suspected, and usually opposed, without any other reason but because they are not common.”

“Society is always taken by surprise at any new example of common sense.”

“A couple who go on living together merely because that was how they began, without any other reason: was that what we were turning into?”

“There is no method of reasoning more common, and yet none more blameable, than, in philosophical disputes, to endeavour the refutation of any hypothesis, by a pretence of its dangerous consequences to religion and morality. When any opinion leads to absurdities, it is certainly false; but it is not certain that an opinion is false, because it is of danger-ous consequence. Such topics, therefore, ought entirely to be forborne; as serving nothing to the discovery of truth, but only to make the personof an antagonist odious.”

“We should always be clear that animal exploitation is wrong because it involves speciesism. And speciesism is wrong because, like racism, sexism, homophobia, anti-semitism, classism, and all other forms of human discrimination, speciesism involves violence inflicted on members of the moral community where that infliction of violence cannot be morally justified. But that means that those of us who oppose speciesism necessarily oppose discrimination against humans. It makes no sense to say that speciesism is wrong because it is like racism (or any other form of discrimination) but that we do not have a position about racism. We do. We should be opposed to it and we should always be clear about that.”

“The book which you read from a sense of duty, or because for any reason you must, does not commonly make friends with you.”