What is necessary at this stage in our evolution is not a 'return' to the psychic powers of our ancestors, but an expansion of our own potential powers, based upon the certain knowledge that such powers exist.

This, I feel, is missing a vital point: that the sceptic is often a totally honest person who, for perfectly good, sound reasons, simply cannot see a case for belief. In fact many -- like Courty Bryan -- admit that they would like to be convinced, but find it impossible.

From that point, my universe went on crumbling; new cracks appeared all the time. I could see that the pleasant securities of childhood, all of those warm little human emotions, all of those trivial aims and purposes that we allow to rule our lives, were an illusion. We were like sheep munching grass, unaware that the butcher's lorry is already on its way. I got used to living with a deep, underlying feeling of uncertainty that no one around me seemed to share. It was rather like living on death row.

I do not regard the late Carl Sagan as any kind of authority. On the contrary, as this book will show, I regard him in many ways as a dubious publicity seeker and careerist, more concerned to maintain his reputation as the brilliant and sceptical representative of hard-headed science than to look squarely and honestly at the facts.

In fact, the real problem with the thesis of A Genealogy of Morals is that the noble and the aristocrat are just as likely to be stupid as the plebeian. I had noted in my teens that major writers are usually those who have had to struggle against the odds -- to "pull their cart out of the mud," as I put it -- while writers who have had an easy start in life are usually second rate -- or at least, not quite first-rate. Dickens, Balzac, Dostoevsky, Shaw, H. G. Wells, are examples of the first kind; in the twentieth century, John Galsworthy, Graham Greene, Evelyn Waugh, and Samuel Beckett are examples of the second kind. They are far from being mediocre writers; yet they tend to be tinged with a certain pessimism that arises from never having achieved a certain resistance against problems.

It seemed perfectly possible that, in spite of my certainty of my own genius, I might die of some illness, or perhaps even in a street accident, before I had ever glimpsed the meaning of life. My moods of happiness and self-confidence convinced me that I had a "destiny" to become a famous writer, and to be remembered as one of the most important thinkers of the century.

The problem is that sex is the most dangerous way of trying to achieve personal growth, because the life force has mixed it so liberally with a string sense of "magic", which, in the attempt at possession turns out to be an illusion. The attempt to possess a woman through an act of sex is as frustrating as trying to possess the scent of a rose by cooking and eating it.

But now we come to the real paradox: that something as explosive as sexual excitement can nevertheless become a matter of habit, But then that applies to all our pleasures. We discover some new product in the supermarket, and become addicted to it. Then our tastebuds become accustomed to its flavour, and or interest fades. In the same way a honeymoon couple may find an excuse to hurry off to the bedroom half a dozen times a day; but after a month or so sex has taken its place among the many routines of their lives. They still enjoy it, but it no longer has quite the same power to excite the imagination. Sex, like every other pleasure, can become mechanical.

In his Experiment in Autobiography (1934), H.G. Wells pointed out that ever since the beginning of life, most creatures have been 'up against it'. Their lives are a drama of struggle against the forces of nature. Yet nowadays you can say to a man: Yes, you earn a living, you support a family, you love and hate, but -- what do you do? His real interest may be in something else -- art, science, literature, philosophy. The bird is a creature of the air, the fish is a creature of the water, and man is a creature of the mind.

It reminds us that a man driven to desire to possess a certain female is a highly purposive individual. We have already noted that evolution tends to mark time when individuals have no reason to evolve. The same applies to individuals; they may be talented and intelligent, and yet waste their lives because they somehow lack the motivation to make use of these faculties. The best piece of luck that can befall any individual is to have a strong sense of purpose.