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Pope St. Pius X’s Motu Proprio Sacrorum Antistitum and the Oath against Modernism

When Pope Pius X was faced with the grave threat of Modernism during his reign (1903-1914), he knew he had to act quickly and decisively to stamp out this “synthesis of all heresies”, as he called it in his landmark encyclical Pascendi Dominici Gregis (n. 39), in which he exposed and refuted the pernicious doctrines of the Modernists at length.

The holy pontiff, who would be canonized a saint less than 40 years after his death (by Pope Pius XII, in 1954), realized that it would not be enough simply to condemn Modernism theoretically but it was necessary to take practical steps to actually eradicate it.… READ MORE