We have lost sight of the original harmony: If you could hear the sound that is produced by the sunflower as it keeps on turning its head toward the sun, the friction between the flower and air, and if you could hear the sound produced by the galaxies, you would hear the symphony of the spheres; and you would realize that this symphony is based upon a basic harmony, the harmony of the spheres.
You have seen so much of the outer world and had so many experiences of people, places, and things—and of course those experiences will keep coming. But now, in the second half of your life, as the outer world seems more unstable and dangerous than ever, we want you to take the same rapacious curiosity that once thrust you all over the planet with a hungry, fascinated appetite, and we want you to turn it inward.