While discharging his professorial duties he delivered courses of Lenten sermons in the principal churches of Toulouse, Avignon, Bordeaux and other cities of Southern France.
Upon the invitation of the bishops of Languedoc he preached throughout their dioceses for ten years, reviving the faith of Catholics, elevating their morals, and combating the doctrine of the Calvinists, with whose ministers he frequently joined in open debate, sometimes in their public synods.
From 1630 to 1659 he filled the office of prior in the convents of Toulouse (twice), Rhodez, Castres, Albi and Avignon and in the general novitiate in Paris, always promoting the reforms in study and religious observance inaugurated by Sebastien Michaelis in the first years of the century.
With Jean de Launoy he was long in controversy as to the Summa Theologiae of Thomas Aquinas, the authenticity of which he ably defended, although he did not demonstrate it, as later writers have done.
The manuscript of a work entitled "Apologia pro sacra congregatione Indicis" having been published with alterations made by a stranger, which brought upon it the condemnation of the Sacred Congregation, he promised a new edition, which was embodied in his "SS.