Source: The Repossession Mambo (2009), Chapter 15 (p. 248)
“The church is like a swimming pool. Most of the noise comes from the shallow end.”
Source: Eternal Life: A New Vision: Beyond Religion, Beyond Theism, Beyond Heaven and Hell
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John Shelby Spong 12
American bishop 1931Related quotes

“Isn’t making a smoking section in a restaurant like making a peeing section in a swimming pool?”

“Clear and cool, clear and cool,
By laughing shallow, and dreaming pool.”
Song I, st. 1.
Water Babies http://www.gutenberg.org/dirs/etext97/wtrbs10h.htm (1863)

http://news.bbc.co.uk/sport2/hi/football/teams/c/chelsea/4392444.stm
Chelsea FC

Vlaams Belang MP shocks and angers with “swimming pool tweet” https://www.brusselstimes.com/brussels-2/60104/vlaams-belang-mp-shocks-and-angers-with-swimming-pool-tweet/. referring to a press article according to which a swimming pool in Utrecht, introduced different schedules for youngsters and families, fearing the former would upset the latter.

Quoted, This Side of Paradise (1920)
The Mask of Apollo (1966)
Context: Christianity and Islam have changed irrevocably the moral reflexes of the world. The philosopher Herakleitos said with profound truth that you cannot step twice into the same river. The perpetual stream of human nature is formed into ever-changing shallows, eddies, falls and pools by the land over which it passes. Perhaps the only real value of history lies in considering this endlessly varied play between the essence and the accidents.