Fritz Leiber book Gather, Darkness!
Source: Gather, Darkness! (1950), Chapter 1 (p. 8)
Fritz Reuter Leiber Jr. was an American writer of fantasy, horror, and science fiction. He was also a poet, actor in theater and films, playwright and chess expert. With writers such as Robert E. Howard and Michael Moorcock, Leiber can be regarded as one of the fathers of sword and sorcery fantasy, having coined the term. Wikipedia

Fritz Leiber book Gather, Darkness!
Source: Gather, Darkness! (1950), Chapter 1 (p. 8)
“There are vampires and vampires, and the ones that suck blood aren’t the worst.”
Short Fiction, Night's Black Agents (1947)
Source: “The Girl with the Hungry Eyes” (p. 240)
Fritz Leiber book Gather, Darkness!
Source: Gather, Darkness! (1950), Chapter 10 (p. 105)
Fritz Leiber book Gather, Darkness!
Source: Gather, Darkness! (1950), Chapter 13 (p. 126)
Fritz Leiber book Conjure Wife
Source: Conjure Wife (1953), Chapter 11 (p. 116).
“A Pail of Air” (p. 20); originally published in Galaxy Science Fiction, December 1951
Short Fiction, A Pail of Air (1964)
Fritz Leiber book Our Lady of Darkness
Source: Our Lady of Darkness (1977), Chapter 17 (p. 95)
Fritz Leiber book Our Lady of Darkness
Source: Our Lady of Darkness (1977), Chapter 27 (p. 166)
“A Bit of the Dark World” (pp. 261-262); originally published in Fantastic, February 1962
Short Fiction, Night's Black Agents (1947)
“The Girl with the Hungry Eyes” (p. 241)
Short Fiction, Night's Black Agents (1947)
Fritz Leiber book Gather, Darkness!
Source: Gather, Darkness! (1950), Chapter 19 (p. 207)
Fritz Leiber book Gather, Darkness!
Source: Gather, Darkness! (1950), Chapter 1 (p. 15)
Fritz Leiber book Our Lady of Darkness
Source: Our Lady of Darkness (1977), Chapter 18 (p. 98)
Fritz Leiber book Our Lady of Darkness
Source: Our Lady of Darkness (1977), Chapter 10 (p. 56)
“What is superstition, but misguided, unobjective science?”
Fritz Leiber book Conjure Wife
Source: Conjure Wife (1953), Chapter 2 (p. 26).
Context: What is superstition, but misguided, unobjective science? And when it comes down to that, is it to be wondered if people grasp at superstition in this rotten, hate-filled, half-doomed world of today? Lord knows, I'd welcome the blackest of black magic, if it could do anything to stave off the atom bomb.
“They’ve heard about space but they still don’t believe in it.”
Fritz Leiber book The Wanderer
Source: The Wanderer (1964), Chapter 6 (p. 37).
Context: They’ve heard about space but they still don’t believe in it. They haven’t been out here to see for themselves that there isn’t any giant elephant under the earth, holding it up, and a giant tortoise holding up the elephant. If I say “planet” and “spaceship” to them, they still think “horoscope” and “flying saucer”.
“The Dreams of Albert Moreland” (p. 182); originally published in The Acolyte, #10, Spring 1945
Short Fiction, Night's Black Agents (1947)
“It was always worth everything to get away by himself, climb a bit, and study the heavens.”
Fritz Leiber book The Wanderer
Source: The Wanderer (1964), Chapter 3 (p. 26).
Source: Bazaar of the Bizarre (pp. 233-234) note: Fafhrd and the Gray Mouser series (1939-1988), Swords Against Death (1970)
“You’ve got to believe there’s some sort of sense in everything that crazies say.”
“Crazies?”
Fritz Leiber book Our Lady of Darkness
“All of us.”
Source: Our Lady of Darkness (1977), Chapter 30 (p. 181)
Fritz Leiber book Our Lady of Darkness
Source: Our Lady of Darkness (1977), Chapter 16 (p. 89)
“I abominate any organization that denies cats are people!”
Fritz Leiber book The Wanderer
Source: The Wanderer (1964), Chapter 3.
“There was always something new to be seen in the unchanging night sky.”
Fritz Leiber book The Wanderer
Source: The Wanderer (1964), Chapter 5 (p. 33).
Fritz Leiber book The Wanderer
Source: The Wanderer (1964), Chapter 42 (p. 340).
Fritz Leiber book The Wanderer
Source: The Wanderer (1964), Chapter 34 (p. 270).
“The greater the variety of intelligent life Don saw, the more he became sensitive to its presence.”
Fritz Leiber book The Wanderer
Source: The Wanderer (1964), Chapter 33 (p. 259).
“Science has only increased the area of the unknown. And if there is a God, her name is Mystery.”
Fritz Leiber book Our Lady of Darkness
Source: Our Lady of Darkness (1977), Chapter 8 (p. 43)
Fritz Leiber book Gather, Darkness!
Source: Gather, Darkness! (1950), Chapter 14 (p. 145)
“Work and pray,
Live on hay.
You’ll get pie
In the sky
When you die—
It’s a lie!”
“Bread Overhead” (p. 121); originally published in Galaxy Science Fiction, February 1958; alluding to the song The Preacher and the Slave.
Short Fiction, A Pail of Air (1964)
“There was an omnipresent sense of crisis.”
Fritz Leiber book The Wanderer
Source: The Wanderer (1964), Chapter 33 (p. 259).
“The 64-Square Madhouse” (p. 74); originally published in If, May 1962
Short Fiction, A Pail of Air (1964)
“Diary in the Snow” (p. 203); originally published in the first edition of Night's Black Agents (1947)
Short Fiction, Night's Black Agents (1947)
Fritz Leiber book The Wanderer
Source: The Wanderer (1964), Chapter 40 (p. 312).
Fritz Leiber book Gather, Darkness!
Source: Gather, Darkness! (1950), Chapter 10 (p. 106)
Short Fiction, Bazaar of the Bizarre (1963)
Fritz Leiber book Gather, Darkness!
Source: Gather, Darkness! (1950), Chapter 19 (p. 195)
“Devils may be nothing but beings intent on their purpose, which now happens to collide with yours.”
Fritz Leiber book The Wanderer
Source: The Wanderer (1964), Chapter 16 (p. 113).
Fritz Leiber book Gather, Darkness!
Source: Gather, Darkness! (1950), Chapter 14 (p. 144)
“Time Fighter” (p. 67); originally published in Fantastic Universe, March 1957
Short Fiction, A Pail of Air (1964)
“A scientist ought to have a healthy disregard for coincidences.”
Fritz Leiber book Conjure Wife
Source: Conjure Wife (1953), Chapter 3 (p. 39).
Fritz Leiber book Poor Superman
Originally published in Galaxy Science Fiction, July 1951, under the title "Appointment in Tomorrow".
Short Fiction, Poor Superman (1951)
“The Hill and the Hole” (p. 165); originally published in Unknown Worlds, August 1942
Short Fiction, Night's Black Agents (1947)
“For that matter, where did I get off being critical of anyone?”
Fritz Leiber book The Big Time
The Big Time (1958)
Fritz Leiber book Conjure Wife
Source: Conjure Wife (1953), Chapter 10 (p. 106).
Fritz Leiber book Our Lady of Darkness
Source: Our Lady of Darkness (1977), Chapter 15 (p. 83)
“Things are different from what I thought. They’re much worse.”
Fritz Leiber book Conjure Wife
Source: Conjure Wife (1953), Chapter 20 (p. 209).
Fritz Leiber book Gather, Darkness!
Source: Gather, Darkness! (1950), Chapter 12 (p. 117)
Fritz Leiber book The Wanderer
Source: The Wanderer (1964), Chapter 42 (pp. 336-337).
Short Fiction, Catch that Zeppelin! (1975)
Short Fiction, Bazaar of the Bizarre (1963)
Source: Bazaar of the Bizarre (p. 234) note: Fafhrd and the Gray Mouser series (1939-1988), Swords Against Death (1970)
“A Bit of the Dark World” (p. 263)
Short Fiction, Night's Black Agents (1947)
Fritz Leiber book Gather, Darkness!
Source: Gather, Darkness! (1950), Chapter 14 (pp. 145-146)
Fritz Leiber book Gather, Darkness!
Source: Gather, Darkness! (1950), Chapter 5 (p. 54)
“That’s what everybody’s been looking for since the Year One—something a little more than sex.”
“The Girl with the Hungry Eyes” (p. 230)
Short Fiction, Night's Black Agents (1947)
Fritz Leiber book The Wanderer
Source: The Wanderer (1964), Chapter 21 (p. 158).
“Nations are as equal as so many madmen or drunkards.”
Fritz Leiber book The Big Time
The Big Time (1958)
Fritz Leiber book Swords Against Death
The Seven Black Priests (pp. 175-176)
Fafhrd and the Gray Mouser series (1939-1988), Swords Against Death (1970)