an airplane when it flies never is able to…
Page 5 keyword change an airplane when it flies never is able to stick to its flight path. If you look out at the edge of the wing, there are little ailerons there to make constant adjustments to the flight path. This is done thousands of times per second as the autopilot recalculates the gap between where the plane is and where it should be and issues corrective instructions. Human being is the same way.
— from Before Takeoff (front matter) · Art of the Good Life
In the book
The plane is never on the line. It is always a little off, always correcting, and that ceaseless correcting is precisely what flight is. A human being is exactly the same. — Before Takeoff (front matter)