As a teenager, I traveled from the United States to London on a school-sponsored trip. Just 14 years old, I regrettably paid more attention to my meals and classmates than to the impressive sights around me. One day, however, I encountered the ruins of a Roman wall. I was awestruck, and my attention was temporarily diverted from typical teenage interests. It was humbling to touch something so ancient. The moss and stone seemed sacred, and I felt as if I were standing on holy ground.