Who is this quote from?

This quote is often misattributed to G.K. Chesterton, but is actually from a Belgian poet.

“When people stop believing in God, they don’t believe in nothing — they believe in anything.

This quotation actually comes from page 211 of Emile Cammaerts’ book The Laughing Prophets (1937) in which he quotes Chesterton as having Father Brown say (in “The Oracle of the Dog” from 1923): “It’s the first effect of not believing in God that you lose your common sense.” Cammaerts then interposes his own analysis between further quotes from Father Brown: “‘It’s drowning all your old rationalism and scepticism, it’s coming in like a sea; and the name of it is superstition.’ The first effect of not believing in God is to believe in anything: ‘And a dog is an omen and a cat is a mystery.'” Note that the remark about believing in anything is outside quotes – it is from Cammaerts. The American Chesterton Society has explained the origin of the phrase. “

QUOTATION:One of the peculiar sins of the twentieth century which we’ve developed to a very high level is the sin of credulity. It has been said that when human beings stop believing in God they believe in nothing. The truth is much worse: they believe in anything.

ATTRIBUTION:Malcolm Muggeridge (1903–1990), British broadcaster. “Woman’s Hour,” radio broadcast, March 23, 1966. Quoted in “An Eighth Deadly Sin,” Muggeridge through the Microphone (1967).

I dont know who said that but its origin is probably from Isaiah 7:9 If you do not stand firm in your faith you will not stand at all.

Mark Twain is my best guess.