37 But it is not solely by objective arguments that the non-believer may be disposed to faith. There are also subjective ones at the disposal of the Modernists, and for those they return to their doctrine of immanence . They endeavour, in fact, to persuade their non-believer that down in the very deeps of his nature and his life lie the need and the desire for religion, and this not a religion of any kind, but the specific religion known as Catholicism, which, they say, is absolutely postulated by the perfect development of life. And here We cannot but deplore once more, and grievously, that there are Catholics who, while rejecting immanence as a doctrine, employ it as a method of apologetics, and who do this so imprudently that they seem to admit that there is in human nature a true and rigorous necessity with regard to the supernatural order - and not merely a capacity and a suitability for the supernatural, order - and not merely a capacity and a suitability for the supernatural, such as has at all times been emphasized by Catholic apologists. Truth to tell it is only the moderate Modernists who make this appeal to an exigency for the Catholic religion. As for the others, who might be called intergralists , they would show to the non-believer, hidden away in the very depths of his being, the very germ which Christ Himself bore in His conscience, and which He bequeathed to the world. Such, Venerable Brethren, is a summary description of the apologetic method of the Modernists, in perfect harmony, as you may see, with their doctrines - methods and doctrines brimming over with errors, made not for edification but for destruction, not for the formation of Catholics but for the plunging of Catholics into heresy; methods and doctrines that would be fatal to any religion.
Source: Pascendi Dominici Gregis (Vatican.va)