In the glance of a speechless animal there is a discourse that only the soul of the wise can really understand.
— An Indian Poet
While in graduate school at Purdue many years ago a friend and I made a road trip to the west coast. Along the way we took the opportunity to visit the Grand Canyon with a goal of hiking down to the canyon floor. Although we were experienced hikers, neither of us were in the best of shape, and we were further weakened by the several days we had just spent driving across the country in a Honda Civic. Hiking all the way down to the canyon floor and all the way back up in a single day was strongly discouraged by the park authorities. Since campsites on the canyon floor were reserved far into the future, we were fortunate to snag a reservation for a campsite that was a couple of miles up from the canyon floor on a different trail. Our plan was to hike down one trail all the way to the bottom, take in the grandeur, then hike back up a few miles to camp for the night. The next day we would hike back out and continue our westward journey.