“So the journey is over and I am back again where I started, richer by much experience and poorer by many exploded convictions, many perished certainties. For convictions and certainties are too often the concomitants of ignorance. Those who like to feel that they are always right and who attach a high importance to their own opinions should stay at home. When one is traveling, convictions are mislaid as easily as spectacles; but unlike spectacles, they are not easily replaced.”