The hajj in Islam, the Camino de Santiago in Catholic Europe, the Char Dham in India, the circuit of Buddhist sites in Nepal and India — every tradition builds journeys that ask the pilgrim to leave ordinary life, walk (or ride, or fly) to a charged place, and return changed.
The container matters: the setting down of daily concern, the time, the company of others on the same road, and the charge of arrival. Pilgrimage is among the few contemplative forms that consistently work on those who do not believe the tradition’s full metaphysics — the road itself does the teaching.