It's Her Ocean Motion, Stupid

Each year, following the labyrinthine journey in the wilderness of the ocean, during which the voyagers are severely tested and must overcome great perils and devilish traps, they are reborn at the feast of the Resurrection of Christ, and are ready to embark once again on their voyage ...

... These are voyages of continual renewal: In the second voyage of the Vita Brendani and the Navagatio, they finally reach the "terra secreata"/"terra repromissionis" which has been promised them, but they may not remain there; the voyage of life must continue in another place. As in the "immrama" in general, reaching the stated goal of the voyage is not the essential thing, but rather the voyaging itself - the endless striving and continual regeneration."

-- Seamus Mac Mathuna, "Contributions to a Study of the Voyages of St. Brendan and St. Malo," in Wooding, The Otherworld Voyage in Early Irish Literature