“The sciences are not sectarian. People do not persecute each other on account of disagreements in mathematics. Families are not divided about botany, and astronomy does not even tend to make a man hate his father and mother. It is what people do not know, that they persecute each other about. Science will bring, not a sword, but peace.”
― Robert G. Ingersoll, Some Mistakes of Moses

“She spoke about it with such emphasis (somewhat affected) that I could see at once that I was hearing the manifesto of her generation. Every generation has its own set of passions, loves, and interests, which it professes with a certain tenacity, to differentiate it from older generations and to confirm itself in its uniqueness. Submitting to a generation mentality (to this pride of the herd) has always repelled me. After Miss Broz had developed her provocative argument (I've now heard it at least fifty times from people her age) that all mankind is divided into those who give hitchhikers lifts (human people who love adventure) and those who don't (inhuman people who fear life), I jokingly called her a "dogmatist of the hitch." She answered sharply that she was neither dogmatist nor revisionist nor sectarian nor deviationist, that those were all words of ours, that we had invented them, that they belonged to us, and that they were completely alien to them.”
― Milan Kundera, The Joke

“The fact that one person imagines a "well-behaved" present and the other a predetermined future does not mean that they therefore fold their arms and become spectators (the former expecting that the present will continue, the latter waiting for the already "known" future to come to pass). On the contrary, closing themselves into "circles of certainty" from which they cannot escape, these individuals "make" their own truth. It is not the truth of men and women who struggle to build the future, running the risks involved in this very construction. Nor is it the truth of men and women who fight side by side and learn together how to build this future—which is not something given to be received by people, but is rather something to be created by them. Both types of sectarian, treating history in an equally proprietary fashion, end up without the people—which is another way of being against them.”
― Paulo Freire, Pedagogy of the Oppressed

“For while libertarians have too often been opportunists who lose sight of or under-cut their ultimate goal, some have erred in the opposite direction: fearing and condemning any advances toward the idea as necessarily selling out the goal itself. The tragedy is that these sectarians, in condemning all advances that fall short of the goal, serve to render vain and futile the cherished goal itself.”
― Murray N. Rothbard, For a New Liberty: The Libertarian Manifesto

“Sectarian thinking is contagious and rapidly spread.”
― Moutasem Algharati

“Of the Russian exiles, Lenin is the last I should have picked as a man of destiny. [Angelica] Balabanoff says that she cannot remember where she first met Lenin and that even when she became conscious of his existence he made no impression upon her. Many others would say the same, but I remember vividly my first meeting with him. It was at dinner in a small Greek restaurant in Soho, not far from the house which bears the tablet commemorating the fact that Karl Marx once lived there. I met him again at Stuttgart, [at the International Socialist Congress] in 1907. In the meantime he had acquired the reputation of being a brilliant student of Marxian economics, a dangerous antagonist in all intra-party controversies and a master of revolutionary tactics and sectarian conspiracies. At the conference he was usually surrounded by a small group of whispering disciples. …

Some of Lenin's enemies believed that he was a paid emissary of the Russian police. His tactics and the dissensions which he promoted among the Russian socialists aroused suspicion. He was a fanatic, a disorganizer, a sectarian, who gave no indication in pre-war days of having the qualities of a national leader. He won his battles but they were always directed against his comrades.”
― Robert Hunter, Revolution Why, How, When?

“All sectarianism is a violation of human rights.”
― Abhijit Naskar, Handcrafted Humanity: 100 Sonnets For A Blunderful World

“The fact that one person imagines a "well-behaved" present and the other a predetermined future does not mean that they therefore fold their arms and become spectators (the former expecting that the present will continue, the latter waiting for the already "known" future to come to pass). On the contrary, closing themselves into "circles of certainty" from which they cannot escape, these individuals "make" their own truth. It is not the truth of men and women who struggle to build the future, running the risks involved in this very construction. Nor is it the truth of men and women who fight side by side and learn together how to build this future—which is not something given to be received by people, but is rather something to be created by them. Both types of sectarian, treating history in an equally proprietary fashion, end up without the people—which is another way of being against them.”
― Donaldo Macedo

“Sectarianism turns mind into manure.”
― Abhijit Naskar, Either Right or Human: 300 Limericks of Inclusion