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.
Os GuinnessTo come to faith on the basis of experience alone is unwise, though not so foolish as to reject faith altogether because of lack of experience ... the quality of a Christian's experience depends on the quality of his faith, just as the quality of his faith depends in turn on the quality of his understanding of God's truth.
Os Guinness