British author G. K. Chesterton (1874–1936) might have the answer:
“When men stop believing in God they don't believe in nothing; they believe in anything.”
This quote is widely attributed to Chesterton, although it obviously does not appear verbatim in his works; it was first recorded as 'The first effect of not believing in God is to believe in anything' in Emile Cammaerts’ book The Laughing Prophet: The Seven Virtues and G.K. Chesterton (London: Methuen & Co., 1937].