"An order was issued to withdraw from Jesuit libraries and from the trade three of his books - "Surnaturel, Corpus Mysticum" and "De la Connaissance de Dieu", as well as a 1949 article in "Recherches" in which de Lubac addressed some criticisms of "Surnaturel".Two months later, it was widely suspected that it was his views which were attacked in the papal encyclical "Humani Generis".