When a man ceases to believe in God, he doesn't believe in nothing. He believes in anything HE WANTS TO.
Which often includes some very stupid things. Take the religious fervor of Progressives, or the pseudoreligious environmentalist movement, for example.
You can get rid of God, but you won't get rid of people's need to believe in something, anything, greater than themselves.
And they will believe.
http://spectator.org/archives/2009/04/10/the-towering-london
Here is a more complete source of the Umberto Eco article:
http://www.umbertoeco.com/en/about-god-and-dan-brown.html
Human beings are religious animals. It is psychologically very hard to go through life without the justification, and the hope, provided by religion. You can see this in the positivist scientists of the 19th century.
They insisted that they were describing the universe in rigorously materialistic terms - yet at night they attended seances and tried to summon up the spirits of the dead. Even today, I frequently meet scientists who, outside their own narrow discipline, are superstitious - to such an extent that it sometimes seems to me that to be a rigorous unbeliever today, you have to be a philosopher. Or perhaps a priest.
BTS