Preface, p. 14, sentence 12.
The Christian Agnostic (1965)
“The god of many cannot remain the true god.”
#138
Vectors: Aphorisms and Ten Second Essays (2001)
Help us to complete the source, original and additional information
James Richardson 89
American poet 1950Related quotes

“I cannot imagine any objective finding that CO2 is a pollutant. If that's true, God is a polluter.”
Congress and global warming, Reprint of article by Greenwire, 2006-08-07 http://gristmill.grist.org/story/2006/8/2/134832/8334,

“God is dead! God remains dead! And we have killed him.”
Sec. 125
The Gay Science (1882)
Context: God is dead! God remains dead! And we have killed him. How shall we comfort ourselves, the murderers of all murderers? What was holiest and mightiest of all that the world has yet owned has bled to death under our knives: who will wipe this blood off us? What water is there for us to clean ourselves? What festivals of atonement, what sacred games shall we have to invent? Is not the greatness of this deed too great for us? Must we ourselves not become gods simply to appear worthy of it?
Knowing Yourself: The True in the False (1996)

§ IV
1910s, At the Feet of the Master (1911)
Context: Superstition is another mighty evil, and has caused much terrible cruelty. The man who is a slave to it despises others who are wiser, tries to force them to do as he does. Think of the awful slaughter produced by the superstition that animals should be sacrificed, and by the still more cruel superstition that man needs flesh for food. Think of the treatment which superstition has meted out to the depressed classes in our beloved India, and see in that how this evil quality can breed heartless cruelty even among those who know the duty of brotherhood. Many crimes have men committed in the name of the God of Love, moved by this nightmare of superstition; be very careful therefore that no slightest trace of it remains in you.

“Coincidence is God's way of remaining anonymous.”
The source generally (but falsely) cited is Einstein's The World As I See It http://en.wikipedia.org/wiki/The_World_as_I_See_It_(book) (1949). The quotation is probably a translation of "Der Zufall ist das Pseudonym, das der liebe Gott wählt, wenn er inkognito bleiben will" (attributed to Albert Schweitzer).
Disputed
“Coincidence is God's way of remaining anonymous.”
Director's commentary for Dragonfly.