But accuracy means something to me. It's vital to my sense of values. I've learned not to trust people who are inaccurate. Every aviator knows that if mechanics are inaccurate. aircraft crash.

Wind, weather, power, load - gradually these elements stop churning in my mind. It's less a decision of logic than a feeling, the kind of feeling that comes when you gauge the distance to be jumped between two stones across a brook. Something within you disengages itself from your body and travels ahead with your vision to make the test. You can feel it try the jump as you stand looking. Then uncertainty gives way to the conviction that it can or can't be done.

On a long flight, after periods of crisis and many hours of fatigue, mind and body may become disunited until at times they seem completely different elements, as though the body were only a home with which the mind has been associated but by no means bound. Consciousness grows independent of the ordinary senses. You see without assistance from the eyes, over distances beyond the visual horizon. There are moments when existence appears independent even of the mind. The importance of physical desire and immediate surroundings is submerged in the apprehension of universal values.

These phantoms speak with human voices — friendly, vapor- like shapes, without substance, able to vanish or appear at will, to pass in and out through the walls of the fuselage as though no walls were there. At times, voices come out of the air itself, clear yet far away, traveling through distances that can't be measured by the scale of human miles; familiar voices, conversing and advising on my flight, discussing problems of my navigation, reassuring me, giving me messages of importance unattainable in ordinary life.

Unless science is controlled by a greater moral force, it will become the Antichrist prophesied by the early Christians.

Science, freedom, beauty, adventure: what more could you ask of life?

Then what am I - the body substance which I can see with my eyes and feel with my hands? Or am I this realization, this greater understanding which dwells within it, yet expands through the universe outside; a part of all existence, powerless but without need for power; immersed in solitude, yet in contact with all creation? There are moments when the two appear inseparable, and others when they could be cut apart by the merest flash of light.