"There was a poem once written on this subject in which one finds words attributed to Satan showing how he trembles each time a Mass, a true Catholic Mass, is celebrated because he is thus reminded of the memory of the Cross, and he knows well that it was by the Cross that he was vanquished. The enemies of the Church who perform sacrilegious Masses in the well-known sects, and the Communists, too, know what value is to be had from one Mass, one true Catholic Mass."
If you think that Satan trembles when the name of one of his greatest-ever servants is mentioned as the "famulo tuo" of God by an SSPX priest in the Canon of the Mass, I don't know what to say.
Tremble, Satan, tremble! With laughter!