Postel resumed his life in Paris, but the Miracle at Laon in 1566 had a profound effect on him, and that year he published an account of it, "De summopere considerando miraculo", in which he again expounded upon the interrelatedness of all parts of the universe and his imminent restoration of the world order. As a result, he was sentenced to house arrest by the parlement of Paris, and eventually spent the last eleven years of his life confined to the monastery of St. Martin des Champs.