In the dark a glimmering light is often sufficient for the pilot to find the polar star and to fix his course. To the pilgrim often a single footstep suffices to enable him to find his way across the bewildering plain.
Basta al nocchier fugace
Che già ritrova il polo,
Già riconosce il mar.
Al pellegrin ben spesso
Basta un vestigio impresso,
Perchè la via fallace
Non l'abbia ad ingannar.
Original text (French)