Jacques was born in central France (perhaps Rheims) and studied at the University of Paris, becoming a canon regular in 1210 at the Priory of Saint-Nicolas d'Oignies in the Diocese of Liège, a post he maintained until his consecration as bishop in 1216. From 1211 to 1213 he preached the Albigensian Crusade, touring France and Germany with William, the archdeacon of Paris, and recruiting many Crusaders.