In describing erroneous development in the Catholic Church after World War II, the encyclical does not mention names, nor does it accuse specific persons or organizations. in France and its followers in other countries increasingly viewed Catholic teaching as relative. It departed from traditional neo-Thomism using relativistic historical analysis and engaging philosophical axioms, such as existentialism, or positivism. scholars expressed Catholic dogma with concepts of modern philosophy, immanentism or idealism or existentialism or any other system. Some believed that the mysteries of faith cannot be expressed by truly adequate concepts but only by approximate and ever-changeable notions. Pius has some sympathy for the need to deepen and more precisely articulate Church doctrine: