8 In fact, only a miracle of that divine power could preserve the Church, the Mystical Body of Christ, from blemish in the holiness of Her doctrine, law, and end in the midst of the flood of corruption and lapses of her members. Her doctrine, law and end have produced an abundant harvest. The faith and holiness of her children have brought forth the most salutary fruits. Here is another proof of her divine life: in spite of a great number of pernicious opinions and great variety of errors (as well as the vast army of rebels) the Church remains immutable and constant, "as the pillar and foundation of truth," in professing one identical doctrine, in receiving the same Sacraments, in her divine constitution, government, and morality. This is all the more marvelous when one considers that the Church not only resists evil but even "conquers evil by doing good." She is constantly blessing friends and enemies alike. She is continually striving and ardently desiring to bring about the social and individual Christian restoration which is her particular mission in the world. Moreover, even her enemies benefit from it.
Source: Editae Saepe (Vatican.va)