I'd get to a point with my colleagues when I couldn't explain any further, because it came down to "To him who has had the experience no explanation is necessary, to him who has not, none is possible.".
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.
