The idea of solvitur ambulando (in walking it will be solved) has been around since St. Augustine, but well before that Aristotle thought and taught while walking the open-air parapets of the Lyceum. It has long been believed that walking in restorative settings could lead not only to physical vigor but to mental clarity and even bursts of genius, inspiration (with its etymology in breathing) and overall sanity. As French academic Frederic Gros writes in A Philosophy of Walking, it’s simply “the best way to go more slowly than any other method that has ever been found.” Jefferson walked to clear his mind, while Thoreau and Nietzsche, like Aristotle, walked to think. “All truly great thoughts are conceived while walking,” wrote Nietzsche in Twilight of the Idols. And Rousseau wrote in Confessions, “I can only meditate when I am walking. When I stop, I cease to think; my mind only works with my legs.”

. . . Here are some of the essential take-homes: we all need nearby nature: we benefit cognitively and psychologically from having trees, bodies of water, and green spaces just to look at; we should be smarter about landscaping our schools, hospitals, workplaces and neighborhoods so everyone gains. We need quick incursions to natural areas that engage our senses. Everyone needs access to clean, quiet and safe natural refuges in a city. Short exposures to nature can make us less aggressive, more creative, more civic minded and healthier overall. For warding off depression, lets go with the Finnish recommendation of five hours a month in nature, minimum. But as the poets, neuroscientists and river runners have shown us, we also at times need longer, deeper immersions into wild spaces to recover from severe distress, to imagine our futures and to be our best civilized selves.

Florence Williams–The Nature Fix: Why Nature Makes us Happier, Healthier, and more Creative