A merchant from Brussels, Belgium either decided to give the boy a leg up in the world, or figured that Guy was a bumpkin who could be defrauded; versions vary. Either way, he offered Guy a part share in a new project that could make him rich. In the first ocean-going expedition in the project, the ship involved sank; Guy took it as a sign that he was right to begin with, and returned to his old life of poverty.
As penance for his bout of greed, Guy made a pilgrimage on foot to Rome, Italy then to Jerusalem where he worked for a while as a guide to pilgrims, then back to Brussels. Though he never joined any order or house, he vowed chastity, and devoted most of his time to prayer, and work as a sacristan.
Many post-mortem miracles attributed to him. An annual festival grew up in the area around his grave, with most of the activities involving horses and the people who work with them because his grave, which was lost for years, was uncovered by a horse.
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