Stein's comment about homosexuality and homophobia, from a conversation with Samuel Steward recounted in Dear Sammy: Letters from Gertrude Stein and Alice B. Toklas (1977)

“A saint a real saint never does anything, a martyr does something but a really good saint does nothing, and so I wanted to have Four Saints who did nothing and I wrote the Four Saints In Three Acts and they did nothing and that was everything.
Generally speaking anybody is more interesting doing nothing than doing something.”

Gertrude Stein

Source: Everybody’s Autobiography (1937), Ch.3

“If the stars are suns and the earth is the earth and there are men only upon this earth and anything can put an end to anything and any dog does anything like anybody does it what is the difference between eternity and anything.”

Gertrude Stein

Source: Everybody’s Autobiography (1937), Ch. 3

“The head-lines which do not head anything they simply replace something but they do not make anything.”

Gertrude Stein

Source: Everybody’s Autobiography (1937), Ch. 5

“When you are writing before there is an audience anything written is as important as any other thing and you cherish anything and everything that you have written. After the audience begins, naturally they create something that is they create you, and so not everything is so important, something is more important than another thing.”

Gertrude Stein

What Are Masterpieces and Why Are There So Few of Them (1936)

“I rarely believe anything, because at the time of believing I am not really there to believe.”

Gertrude Stein

Source: Everybody’s Autobiography (1937), Ch. 3

“Poetry is I say essentially a vocabulary just as prose is essentially not. And what is the vocabulary of which poetry absolutely is. It is a vocabulary based on the noun as prose is essentially and determinately and vigorously not based on the noun. Poetry is concerned with using with abusing, with losing with wanting with denying with avoiding with adoring with replacing the noun. It is doing that always doing that, doing that doing nothing but that. Poetry is doing nothing but using losing refusing and pleasing and betraying and caressing nouns. That is what poetry does, that is what poetry has to do no matter what kind of poetry it is. And there are a great many kinds of poetry. So that is poetry really loving the name of anything and that is not prose.”

Gertrude Stein

"Poetry and Grammar"
Lectures in America (1935)

“A novel is what you dream in your night sleep. A novel is not waking thoughts although it is written and thought with waking thoughts. But really a novel goes as dreams go in sleeping at night and some dreams are like anything and some dreams are like something and some dreams change and some dreams are quiet and some dreams are not. And some dreams are just what any one would do only a little different always just a little different and that is what a novel is.”

Gertrude Stein

"The Superstitions of Fred Anneday, Annday, Anday; a Novel of Real Life" (1935)
How Writing Is Written: Previously Uncollected Writings, vol.II (1974)

“Before one is successful that is before any one is ready to pay money for anything you do then you are certain that every word you have written is an important word to have written and that any word you have written is as important as any other word and you keep everything you have written with great care.”

Gertrude Stein

Source: Everybody’s Autobiography (1937), Ch. 2

“She took us to see her granddaughter who was teaching in the Dominican convent in San Raphael, we went across the bay on a ferry, that had not changed but Goat Island might just as well not have been there, anyway what was the use of my having come from Oakland it was not natural to have come from there yes write about it if I like or anything if I like but not there, there is no there there.”

Gertrude Stein

Source: Everybody’s Autobiography (1937), Ch. 4, p. 289

“Human nature, human nature acts as it acts when it is identified when there is an identity but it is not human nature that has anything to do with that it is that anybody is there where they are, it is that that has to do with identity, with government and propaganda with history with individualism and with communism but it has nothing nothing to do with the human mind … because the human mind writes what there is and what has identity go to do with that … nothing at all.”

Gertrude Stein

Quoted in Really Reading Gertrude Stein : A Selected Anthology with essays (1989) by Judy Grahn (Crossing Press ISBN 0-895-94380-8, p. 253

“The reason why all of us naturally began to live in France is because France has scientific methods, machines and electricity, but does not really believe that these things have anything to do with the real business of living.”

Gertrude Stein book Paris France

Source: Paris France (1940), p. 8