Friedrich Nietzsche predicted that secular people, losing touch with transcendence, would eventually lose a reference point from which to look down and judge themselves. In the end they would lose even the capacity to despise themselves. Thus, because of the ‘death of God’, they would confuse heaven with happiness, and happiness with health.
Sometimes when I listen to people who say they have lost their faith, I am far less surprised than they expect. If their view of God is what they say, then it is only surprising that they did not reject it much earlier. Other people have a concept of God so fundamentally false that it would be better for them to doubt than to remain devout. The more devout they are, the uglier their faith will become since it is based on a lie. Doubt in such a case is not only highly understandable, it is even a mark of spiritual and intellectual sensitivity to error, for their picture is not of God but an idol.
― Os Guinness