Biogenesis is in the first place psychogenesis. This truth was never more manifest than on Mars, where noosphere preceded biosphere— the layer of thought first enwrapping the silent planet from afar, inhabiting it with stories and plans and dreams, until the moment when John stepped out and said Here we are— from which point of ignition the green force spread like wildfire, until the whole planet was pulsing with viriditas. It was as if the planet itself had felt something missing, and at the tap of mind against rock, noosphere against lithosphere, the absent biosphere had sprung into the gap with the startling suddenness of a magician’s paper flower.

Or so it seemed to Michel Duval, who was passionately devoted to every sign of life in the rust waste; who had seized Hiroko’s areophany with the fervor of a drowning man thrown a buoy. It had given him a new way of seeing. To practice this sight he had taken on Ann’s habit of walking outside in the hour before sunset, and in the long-shadowed landscapes he found every patch of grass a piercing delight. In each little tangle of sedge and lichen he saw a miniature Provence.

This was his task, as he now conceived it: the hard work of reconciling the centrifugal antinomy of Provence and Mars. He felt that in this project he was part of a long tradition, for recently in his studies he had noticed that the history of French thought was dominated by attempts to resolve extreme antinomies. For Descartes it had been mind and body, for Sartre, Freudianism and Marxism, for Teilhard de Chardin, Christianity and evolution— the list could be extended, and it seemed to him that the particular quality of French philosophy, its heroic tension and its tendency to be a long march of magnificent failures, came from this repeated attempt to yoke together impossible opposites. Perhaps they were all, including his, attacks on the same problem, the struggle to knit together spirit and matter. And perhaps this was why French thought had so often welcomed complex rhetorical apparatuses such as the semantic rectangle, structures which might bind these centrifugal oppositions in nets strong enough to hold them.

So now it was Michel’s work patiently to knit green spirit and rust matter, to discover the Provence in Mars. Crustose lichen, for instance, made parts of the red plain look as if they were being plated with apple jade. And now, in the lucid indigo evenings (the old pink skies had made grass look brown), the sky’s color allowed every blade of grass to radiate such pure greens that the little meadow lawns seemed to vibrate. The intense pressure of color on the retina . . . such delight.