He entered the Society of Jesus in 1595, was ordained priest, and in 1620 left the Company in order to devote himself more freely to the conversion of Protestants through preaching and writing, in which he was most skilled, achieving excellent results even among the cultured classes. On 19 March 1622 he also obtained from the King permission to preach in public squares and, with the consent of the clergy, disputed with whomever presented themselves. He was appointed curé at St-Brice and at Charenton, where he died.
His work, *Méthode de traiter des controverses de religion par la seule Escriture saincte alléguée en termes expres ou exposée par les saints Pères*... (definitive ed., 3 vols., Paris 1638-39), enjoyed wide circulation. Another celebrated work was *Règle générale de la foy catholique séparée de toutes autres doctrines*... (ibid. 1646; reprinted several times subsequently, translated into Latin by the Jesuits of Ingolstadt and into other languages). In 1646 he also published a French version of the New Testament which provoked some controversy. He also polemicized against Jansenism in *In Jansenii praetensum Augustinum* (Paris 1647). He wrote also on the Mass, Purgatory, and the Pope, but in 1641 his work *De la primauté en l’Église ou de la hiérarchie d’icelle*, composed against Blondel, was placed on the Index.