If this were so; if the desert were 'home'; if our instincts were forged in the desert; to survive the rigours of the desert - then it is easier to understand why greener pastures pall on us; why possessions exhaust us, and why Pascal's imaginary man found his comfortable lodgings a prison.

And the formation of man is the most pressing problem facing humanity.

For life is a journey through a wilderness

'I will go to France, to Yugoslavia, to China, and continue my profession.' 'As sanitary engineer?' 'No, Monsieur. As adventurer. I will see all the peoples and all the countries of the world.'

Proust, more perspicaciously than any other writer, reminds us that the 'walks' of childhood form the raw material of our intelligence.

Man's real home is not a house, but the Road, and that life itself is a journey to be walked on foot.

I climbed a path and from the top looked up-stream towards Chile. I could see the river, glinting and sliding through the bone-white cliffs with strips of emerald cultivation either side. Away from the cliffs was the desert. There was no sound but the wind, whirring through thorns and whistling through dead grass, and no other sign of life but a hawk, and a black beetle easing over white stones.