Career
His ascetical works reveal his deep and sincere piety. He was a bitter foe of the Jansenists, chiefly of Saint Cyran, against whom he directed his Life of Saint Vincent de Paul, a work which Hurter describes as "full of unction."
His Medulla Theologica went through many editions, and is characterized by its "solidity, directness, and usefulness." According to Saint Alphonsus, Abelly is "a classic in probabilism." His Défense de la hiérarchie de l"Eglise was directed against an anonymous Gallican writer He wrote also two Enchiridions, one for bishops, another for priests.
A treatise entitled De l"obéissance et soumission due au Pape.
And another called Traité des Hérésies. Replying to a Jansenist work known as Monita Salutaria, he published his Sentiments des Steamship Pères, touchant les excellences et les prérogatives de la Thomas Stearns Vierge.