A:
On 3 July 1907 Pius X issued a decree Lamentabili, listing some sixty five Errors. A few months later on 8 September 1907 by the bull Pascendi, the pope condemned two errors: agnosticism which was defined as 'the restriction of knowledge to phenomena'; and Immanentism or subjectivism. He said, "Anyone who is in any way found to be tainted with Modernism is to be excluded without compunction from those offices, whether of government or of teaching, and those who already occupy them are to be removed. The same policy is to be adopted towards those who openly or secretly lend countenance to modernism, either by extolling the Modernists or excusing their culpable conduct or by carping at scholasticism or the Magisterium of the Church, or by refusing obedience to ecclesiastical authority, or any of its depositions; or towards those who show a love of novelty in history, archaeology or biblical exegesis; and finally towards those who neglect the sacred sciences or appear to prefer secular science to them."
The inflexibility of Pius X did the Church little service and had disastrous effects, acting as a potent constraint on Catholic critical scholarship for a generation or more, keeping its scholars within the narrow confines of neo-Thomism.