 In bold language he inveighs (or strongly protests) against the corruption among the clergy and discusses the question of reform.While engaged on his remarkable work "De Vera Theologia" his strength threatened to fail him by reason of his great age and infirmity, but, having taken a vow to defend in the course of this work the doctrine of the Immaculate Conception of the Blessed Virgin, he instantly, so he tells us, recovered his strength and health (MSS.52, 54, 60, St. Isidore's Coll.