It has been said that trees are imperfect men, and seem to bemoan their
imprisonment rooted in the ground. But they never seem so to me. I never
saw a discontented tree. They grip the ground as though they liked it, and
though fast rooted they travel about as far as we do. They go wandering
forth in all directions with every wind, going and coming like ourselves,
traveling with us around the sun two million miles a day, and through space
heaven knows how fast and far!
-- John Muir, American Naturalist (1838-1914)