所謂行萬里路，就是出門旅行，探索書中未及之處，從而增廣見聞與知識。希波主教聖奧古斯丁（St. Augustine of Hippo, 354-430）在其《懺悔錄》中提到：「人們出國遠足，可以觀賞巍峨之高，狂瀾之巨，長河之雄，汪洋之闊，繁星之燦。」（原為拉丁文，英譯“People travel to wonder at th of mountains, at the huge waves of the sea, at the long courses of rivers, at the vast compass of the ocean, at the circular motion of the stars; and they pass
by themselves without wondering.”）可謂千古雋言；英國保守黨政治家班傑明．迪斯雷利（Benjamin Disraeli, 1804-1881）為這句話作了最佳的註解，他說：「旅行是真正知識的偉大泉源。」（Travel is the great source of true wisdom.）真是一語中的，道出了行萬里路內涵的精髓。
