Source: The Quincunx of Time (1973), Chapter 10, “Weinbaum on Sinai” (p. 116)
Quotes from book
The Quincunx of Time

The Quincunx of Time is a short science fiction novel by American writer James Blish. It is an extended version of a short story entitled "Beep", published by Galaxy Science Fiction magazine in 1954. The novel form was first published in 1973.
Prologue, “A Frame on Randolph” (p. 18)
The Quincunx of Time (1973)
Source: The Quincunx of Time (1973), Chapter 8, “The Courtship of Posi and Nega” (p. 84; ellipsis in the original)
Source: The Quincunx of Time (1973), Chapter 8, “The Courtship of Posi and Nega” (p. 89)
“The technicians thought I was crazy. Now, five months later, I’ve proved it.”
Source: The Quincunx of Time (1973), Chapter 7, “A Few Cosmic Jokes” (p. 72)
Source: The Quincunx of Time (1973), Chapter 7, “A Few Cosmic Jokes” (p. 77)
Source: The Quincunx of Time (1973), Chapter 10, “Weinbaum on Sinai” (pp. 118-119)
“The motto of the bureau,” Weinbaum said, “is, ‘sometimes something works.’”
Source: The Quincunx of Time (1973), Chapter 7, “A Few Cosmic Jokes” (p. 75)
Source: The Quincunx of Time (1973), Chapter 9, “A Comity of Futures” (p. 105)
“Something tells me that this isn’t going to be as simple as it looks.”
“What is?” Wald said, raising his eyebrows.
“Nothing, of course. But hope springs eternal in the human spleen.”
Source: The Quincunx of Time (1973), Chapter 7, “A Few Cosmic Jokes” (p. 77)